| **Business and Summary of Significant Accounting Principles (Narratives) (Details) (USD $)** | 3 Months Ended | 12 Months Ended |
|----------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Business and Summary of Significant Accounting Policies [Abstract]**                       |           |            |   |   |   |   |   |   |   |   |   |
| PreferredStockSharesAuthorized                                                               | 1,000,000      |            |   |   | 1,000,000 |   |   |   | 1,000,000 | 1,000,000 | 1,000,000 |
| AdvertisingExpense                                                                           |           |            |   |   |   |   |   |   | $ 4,900,000 | $ 4,200,000 | $ 4,300,000 |
| InterestCostsCapitalized                                                                     |           |            |   |   |   |   |   |   | 2,800,000 | 3,700,000 | 1,100,000 |
| ChangeInAccountingEstimateFinancialEffect                                                    |           |            |   |   |   |   |   |   | Effective in the second quarter of 2010, we changed our USF high cost area program support accrual methodology due to a change in our estimate of the current amounts expected to be paid to us.  The effect of this change in estimate was a revenue increase of $4.7 million, a net income increase of $3.1 million and a basic and diluted net income per share increase of $0.06 for the year ended December 31, 2010. |   |   |
| Immaterial Error Correction                                                                  |           |            |   |   |   |   |   |   | Immaterial Error CorrectionDuring the first quarter of 2012, we identified an error in the depreciable life of one fixed asset.  The error resulted in a $146,000 quarterly or $585,000 annual understatement of depreciation expense in 2007 through 2009 and a corresponding overstatement of net property and equipment in service for the same periods.  For the years ended December 31, 2011 and 2010, the error resulted in a $195,000 and $585,000, respectively, understatement to depreciation expense and corresponding overstatement of net property and equipment in service for the same periods.  In order to assess materiality of this error we considered SAB 99, “Materiality” and SAB 108, “Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements,” and determined that the impact of this error on prior period consolidated financial statements was immaterial. Although the error was and continues to be immaterial to prior periods, because of the significance of the cumulative error in the first quarter of 2012, we revised our prior period financial statements. |   |   |
| **Statement [Line Items]**                                                                   |           |            |   |   |   |   |   |   |   |   |   |
| Revenues                                                                                     | 183,676,000    | 178,494,000     | 176,104,000 | 171,907,000 | 168,812,000 | 177,703,000 | 168,089,000 | 164,777,000 | 710,181,000 | 679,381,000 | 651,250,000 |
| Receivables                                                                                  | 150,436,000    |            |   |   | 141,827,000 |   |   |   | 150,436,000 | 141,827,000 |   |
| Stock Buyback Program [Member]                                                               |           |            |   |   |   |   |   |   |   |   |   |
| **Class of Stock [Line Items]**                                                              |           |            |   |   |   |   |   |   |   |   |   |
| Stock Repurchase Program, Remaining Value Authorized to be Repurchased                       |           |            |   |   |   |   |   |   | 101,000,000 |   |   |
| Common Stock - Class A [Member]                                                              |           |            |   |   |   |   |   |   |   |   |   |
| **Class of Stock [Line Items]**                                                              |           |            |   |   |   |   |   |   |   |   |   |
| Stock Repurchased During Period, Shares                                                      |           |            |   |   |   |   |   |   | 1,500,000 | 5,200,000 | 8,000,000 |
| Stock Repurchased During Period, Value                                                       |           |            |   |   |   |   |   |   | 14,000,000 | 52,600,000 | 80,800,000 |
| Remote High Cost Support Program [Member]                                                    |           |            |   |   |   |   |   |   |   |   |   |
| **Statement [Line Items]**                                                                   |           |            |   |   |   |   |   |   |   |   |   |
| Receivables                                                                                  | 32,000,000     |            |   |   |   |   |   |   | 32,000,000 |   |   |
| Urban High Cost Support Program [Member]                                                     |           |            |   |   |   |   |   |   |   |   |   |
| **Statement [Line Items]**                                                                   |           |            |   |   |   |   |   |   |   |   |   |
| Receivables                                                                                  | 3,600,000      |            |   |   |   |   |   |   | 3,600,000 |   |   |
| Total High Cost Support Program [Member]                                                     |           |            |   |   |   |   |   |   |   |   |   |
| **Statement [Line Items]**                                                                   |           |            |   |   |   |   |   |   |   |   |   |
| Revenues                                                                                     |           |            |   |   |   |   |   |   | $ 42,800,000 | $ 48,800,000 | $ 51,700,000 |

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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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| - Definition
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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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Disclosure of the effect on income from continuing operations, net income (or other appropriate captions of changes in applicable net assets or performance indicator), and any related per-share amounts of the current period when a change in accounting estimate affects several future periods.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Describes nature and related effect on financial statements related to corrections of prior year errors in the current year financial statements when the effect of the prior year error was immaterial to the prior year financial statements and the current year correction is immaterial to the current year financial statements.
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| - Definition
Amount of interest capitalized during the period.
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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.
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| - 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.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
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| - Definition
The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.
+ References
No definition available.
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