| **Goodwill And Other Intangibles (Components Of Goodwill By Reporting Units) (Details) (USD $)In Thousands, unless otherwise specified** | Dec. 31, 2013 | Dec. 31, 2012 |
|------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Indefinite-lived Intangible Assets by Segment [Line Items]**                                                                           |          |          |
| Goodwill                                                                                                                                 | $ 6,337,719   | $ 6,337,719   |
| Central [Member]                                                                                                                         |          |          |
| **Indefinite-lived Intangible Assets by Segment [Line Items]**                                                                           |          |          |
| Goodwill                                                                                                                                 | 1,815,498     |          |
| East [Member]                                                                                                                            |          |          |
| **Indefinite-lived Intangible Assets by Segment [Line Items]**                                                                           |          |          |
| Goodwill                                                                                                                                 | 2,003,574     |          |
| National [Member]                                                                                                                        |          |          |
| **Indefinite-lived Intangible Assets by Segment [Line Items]**                                                                           |          |          |
| Goodwill                                                                                                                                 | 1,218,113     |          |
| West [Member]                                                                                                                            |          |          |
| **Indefinite-lived Intangible Assets by Segment [Line Items]**                                                                           |          |          |
| Goodwill                                                                                                                                 | $ 1,300,534   |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266
+ Details**Name:**us-gaap_Goodwill**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |