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Valuation And Qualifying Accounts | 12 Months Ended
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Dec. 31, 2011
Valuation And Qualifying Accounts [Abstract] |
Valuation And Qualifying Accounts | SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (amounts in thousands)
Description |  | Balance at beginning of period |  |  | Charges to costs and expenses |  |  | Acquisitions of business |  |  | Write-off of uncollectible accounts |  |  | Balance at end of period |
Allowance for doubtful accounts receivable: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2011 |  | $ | 248,622 |  |  | $ | 613,619 |  |  | $ | — |  |  | $ | (608,836 | ) |  | $ | 253,405 |
Year ended December 31, 2010 |  | $ | 168,876 |  |  | $ | 546,909 |  |  | $ | 56,596 |  |  | $ | (523,759 | ) |  | $ | 248,622 |
Year ended December 31, 2009 |  | $ | 162,975 |  |  | $ | 508,603 |  |  | $ | — |  |  | $ | (502,702 | ) |  | $ | 168,876 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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