| **Business and Summary of Significant Accounting Principles (Narratives) (Details) (USD $)** | 0 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 9 Months Ended | 12 Months Ended | 0 Months Ended |                           |             | 12 Months Ended |
|----------------------------------------------------------------------------------------------|----------------|----------------|-----------------|----------------|-----------------|----------------|----------------|-----------------|----------------|---------------------------|-------------|-----------------|
||
| **Business**                                                                                 |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Year founded                                                                                 |           |           |            |           |            |           |           |            |           | 1979                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Acquisition**                                                                              |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Purchase of business                                                                         | $ 100,000,000  |           |            |           |            |           |           |            |           | $ 107,600,000             | $ 1,874,000 | $ 352,000       |   |   |   |   |   |   |   |   |   |   |   | $ 100,000,000 |   |   | $ 7,600,000 |   |   |   |   |   |   |
| Percentage of voting interests acquired                                                      |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   | 33.30% |   |   |   |   |   |   |   |   |   |
| Preferential cash distributions                                                              |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   | 190,000,000 |   |   |   |   |   |   |   |   |   |
| Preference period                                                                            |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   | 4 years |   |   |   |   |   |   |   |   |   |
| Percent received from AWN                                                                    |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   | 66.60% |   |   |   |   |   |   |   |   |   |
| Preferential adjustment maximum                                                              |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   | 21,800,000 | 21,800,000 |   |   |   |   |   |   |   |
| Goodwill                                                                                     |           | 219,041,000    |            |           |            | 77,294,000     |           |            |           | 219,041,000               | 77,294,000  | 74,883,000      |   |   |   |   |   |   |   |   |   |   |   | 140,081,000 |   |   |   |   |   |   |   |   |   |
| Additional revenue                                                                           |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   | 50,600,000 |   |   |   |   |   |   |   |
| Transaction costs                                                                            |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 1,800,000 | 2,900,000 |   |   |   |   |
| **Denali Media Holdings**                                                                    |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Number of broadcast stations acquired                                                        |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 3 |   |   |   |   |   |   |
| **Common Stock**                                                                             |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Authorized amount, repurchase of stock                                                       |           |           |            |           |            |           |           |            |           |                      |        |            | 200,000,000.0 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Authorized amount per quarter, repurchase of stock                                           |           |           |            |           |            |           |           |            |           |                      |        |            | 5,000,000.0 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Stock repurchased during period, shares                                                      |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   | 1,800,000 | 1,500,000 | 5,200,000 |   |   |   |   |   |   |   |   |   |   |
| Stock repurchased during period, value                                                       |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   | 15,600,000 | 14,000,000 | 52,600,000 |   |   |   |   |   |   |   |   |   |   |
| Stock repurchase program, remaining value authorized to be repurchased                       |           |           |            |           |            |           |           |            |           | 106,000,000               |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Redeemable Preferred Stock**                                                               |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Preferred stock, shares authorized                                                           |           | 1,000,000      |            |           |            |           |           |            |           | 1,000,000                 |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Preferred stock, shares outstanding                                                          |           | 0              |            |           |            | 0              |           |            |           | 0                         | 0           | 0               |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Accounts Receivable and Allowance for Doubtful Receivables**                               |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Past due period                                                                              |           |           |            |           |            |           |           |            |           | 120 days                  |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Intangible Assets**                                                                        |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Finite-lived intangible asset, useful life                                                   |           |           |            |           |            |           |           |            |           | 15 years 9 months 18 days |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 20 years | 2 years | 20 years |   |
| **Asset Retirement Obligation**                                                              |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Additional capitalized costs                                                                 |           | 10,500,000     |            |           |            | 700,000        |           |            |           | 10,500,000                | 700,000     |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Revenue Recognition**                                                                      |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Number of customers who received denial notice                                               |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 2 |
| Amount recognized from appeal                                                                |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 5,700,000 |
| Maximum cost per line, per month                                                             |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   | 250 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Percentage phase down, decrease in support payments                                          |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   | 20.00% |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Percentage phase down, maximum decrease in support payments                                  |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   | 20.00% | 60.00% |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Revenues:                                                                                    |           | 217,828,000    | 217,943,000     | 189,661,000    | 186,216,000     | 183,676,000    | 178,494,000    | 176,104,000     | 171,907,000    | 811,648,000               | 710,181,000 | 679,381,000     |   | 55,600,000 | 42,800,000 | 48,800,000 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Receivables                                                                                  |           | 228,372,000    |            |           |            | 150,436,000    |           |            |           | 228,372,000               | 150,436,000 |            |   |   |   |   | 45,900,000 |   |   | 500,000 |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Advertising Expense**                                                                      |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Advertising expense                                                                          |           |           |            |           |            |           |           |            |           | 5,200,000                 | 4,900,000   | 4,200,000       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Interest Expense**                                                                         |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest costs capitalized                                                                   |           |           |            |           |            |           |           |            |           | 4,600,000                 | 2,800,000   | 3,700,000       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Guarantees**                                                                               |           |           |            |           |            |           |           |            |           |                      |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Guarantor obligations, value                                                                 |           | $ 56,000,000   |            |           |            |           |           |            |           | $ 56,000,000              |        |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

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Stock Repurchase Program, Authorized Amount Per Quarter
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| - Definition
Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.
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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.
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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.
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| - Definition
Percentage of voting equity interests acquired at the acquisition date in the business combination.
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The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.
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| - Definition
The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets.
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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.
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Amount of interest capitalized during the period.
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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.
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| - Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5
+ Details**Name:**us-gaap_PreferredStockSharesOutstanding**Namespace Prefix:**us-gaap_**Data Type:**xbrli:sharesItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cash received for the settlement of litigation during the current period.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585
+ Details**Name:**us-gaap_ProceedsFromLegalSettlements**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_RevenueRecognitionAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5
+ Details**Name:**us-gaap_StockRepurchasedDuringPeriodShares**Namespace Prefix:**us-gaap_**Data Type:**xbrli:sharesItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5
+ Details**Name:**us-gaap_StockRepurchasedDuringPeriodValue**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of a stock repurchase plan authorized by an entity's Board of Directors.
+ References
No definition available.
+ Details**Name:**us-gaap_StockRepurchaseProgramAuthorizedAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
No definition available.
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| X                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Year the entity was founded, in CCYY format.
+ References
No definition available.
+ Details**Name:**us-gaap_YearFounded**Namespace Prefix:**us-gaap_**Data Type:**xbrli:gYearItemType**Balance Type:**na**Period Type:**duration |