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Condensed Consolidating Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items] |  |
REVENUES | $ 425,724 | $ 435,305
EXPENSES: |  |
Operating | 307,530 | 315,534
General and administrative | 31,232 | 21,840
Depreciation and amortization | 27,630 | 28,387
Costs and Expenses | 366,392 | 365,761
Operating income | 59,332 | 69,544
OTHER (INCOME) EXPENSE: |  |
Interest expense, net | 12,566 | 16,890
Expenses associated with debt refinancing transactions | 225 | 1,541
Other (income) expense | 101 | 12
Total non-operating expense (income) | 12,892 | 18,443
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | 46,440 | 51,101
Income tax (expense) benefit | 134,652 | (19,059)
INCOME (LOSS) FROM CONTINUING OPERATIONS | 181,092 | 32,042
Loss from discontinued operations, net of taxes |  | (362)
NET INCOME | 181,092 | 31,680
Parent |  |
Condensed Financial Statements, Captions [Line Items] |  |
REVENUES | 313,437 | 349,574
EXPENSES: |  |
Operating | 234,660 | 237,531
General and administrative | 9,609 | 17,384
Depreciation and amortization | 18,651 | 18,251
Costs and Expenses | 262,920 | 273,166
Operating income | 50,517 | 76,408
OTHER (INCOME) EXPENSE: |  |
Interest expense, net | 10,095 | 16,594
Expenses associated with debt refinancing transactions | 177 | 1,541
Other (income) expense | 321 | 21
Total non-operating expense (income) | 10,593 | 18,156
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | 39,924 | 58,252
Income tax (expense) benefit | 138,211 | (20,796)
INCOME (LOSS) FROM CONTINUING OPERATIONS | 178,135 | 37,456
Gain/Loss from equity in subsidiaries | 2,957 | (5,776)
NET INCOME | 181,092 | 31,680
Combined Subsidiary Guarantors |  |
Condensed Financial Statements, Captions [Line Items] |  |
REVENUES | 341,994 | 90,621
EXPENSES: |  |
Operating | 302,577 | 82,893
General and administrative | 21,623 | 4,456
Depreciation and amortization | 8,979 | 10,136
Costs and Expenses | 333,179 | 97,485
Operating income | 8,815 | (6,864)
OTHER (INCOME) EXPENSE: |  |
Interest expense, net | 2,471 | 296
Expenses associated with debt refinancing transactions | 48 |
Other (income) expense | (201) | (29)
Total non-operating expense (income) | 2,318 | 267
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | 6,497 | (7,131)
Income tax (expense) benefit | (3,559) | 1,737
INCOME (LOSS) FROM CONTINUING OPERATIONS | 2,938 | (5,394)
Loss from discontinued operations, net of taxes |  | (362)
NET INCOME | 2,938 | (5,756)
Consolidating Adjustments and Other |  |
Condensed Financial Statements, Captions [Line Items] |  |
REVENUES | (229,707) | (4,890)
EXPENSES: |  |
Operating | (229,707) | (4,890)
Costs and Expenses | (229,707) | (4,890)
OTHER (INCOME) EXPENSE: |  |
Other (income) expense | (19) | 20
Total non-operating expense (income) | (19) | 20
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | 19 | (20)
INCOME (LOSS) FROM CONTINUING OPERATIONS | 19 | (20)
Gain/Loss from equity in subsidiaries | (2,957) | 5,776
NET INCOME | $ (2,938) | $ 5,756

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