Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation And Qualifying Accounts (Details)

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Schedule II - Valuation And Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Schedule II Valuation And Qualifying Accounts [Abstract]      
Balance at Beginning of Period $ 6,800 [1] $ 10,199 [1] $ 10,000 [1]
Charged to Costs and Expenses 3,200 [1] 545 [1] 4,493 [1]
Deductions 2,723 [1],[2] 3,944 [1],[2] 4,294 [1],[2]
Balance at End of Period $ 7,277 [1] $ 6,800 [1] $ 10,199 [1]
[1] This table does not include any allowances for revenue adjustments that result from billing corrections, customer allowances, money-back service guarantees and other miscellaneous revenue adjustments that are recorded in our revenue from operations.
[2] Uncollectible accounts written off, net of recoveries.