Quarterly report pursuant to Section 13 or 15(d)

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidated Condensed Statements of Cash Flows (Detail)

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Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidated Condensed Statements of Cash Flows (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net income (loss) $ 572 $ 26,326
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 29,512 27,619
Loss on extinguishment of debt     
Gain on disposition of assets (1,148) (492)
Deferred income tax expense (1,607) 5,012
Expenses not requiring cash 7,179 6,999
Change in accounts receivable (18,557) (6,280)
Change in other assets (8,018) (3,419)
Change in accrued income taxes 1,560 (450)
Change in liabilities 17,747 (19,550)
Net cash provided by (used in) operating activities 27,240 35,765
Cash flows from investing activities:    
Capital expenditures (30,023) (59,433)
Proceeds from the sale of assets 1,550 736
Net cash (used in) investing activities (28,473) (58,697)
Cash flows from financing activities:    
Paydown on term note (2,500) (6,000)
Payment of debt issuance costs (307)  
Excess tax benefit from stock-based compensation (159) 59
Net cash provided by (used in) financing activities (2,966) (5,941)
Net change in cash and cash equivalents (4,199) (28,873)
Cash and cash equivalents, beginning of year 87,886 97,869
Cash and cash equivalents, end of period 83,687 68,996
Parent [Member]
    
Cash flows from operating activities:    
Net income (loss) 592 26,392
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Loss on extinguishment of debt     
Deferred income tax expense (8,310) 4,618
Expenses not requiring cash 2,951 6,839
Equity in net earnings of subsidiaries (179) (31,900)
Change in accounts receivable (25) (95)
Change in other assets (3,051) (20,726)
Change in accrued income taxes (630) (322)
Change in liabilities 10,412 6,476
Net cash provided by (used in) operating activities 1,760 (8,718)
Cash flows from financing activities:    
Paydown on term note (2,500) (6,000)
Payment of debt issuance costs (307)  
Excess tax benefit from stock-based compensation (159) 59
Intercompany advances, net 2,447 (6,150)
Net cash provided by (used in) financing activities (519) (12,091)
Net change in cash and cash equivalents 1,241 (20,809)
Cash and cash equivalents, beginning of year 42,251 55,670
Cash and cash equivalents, end of period 43,492 34,861
Guarantor [Member]
    
Cash flows from operating activities:    
Net income (loss) 10,159 21,173
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 18,659 15,595
Loss on extinguishment of debt     
Gain on disposition of assets (1,108) (418)
Deferred income tax expense 2,936 2,550
Expenses not requiring cash 5,875 191
Change in accounts receivable (14,540) (2,326)
Change in other assets (3,030) 16,618
Change in accrued income taxes 1,141 (30)
Change in liabilities 3,784 (24,073)
Net cash provided by (used in) operating activities 23,876 29,280
Cash flows from investing activities:    
Capital expenditures (21,998) (56,611)
Proceeds from the sale of assets 1,504 697
Net cash (used in) investing activities (20,494) (55,914)
Cash flows from financing activities:    
Intercompany advances, net (8,484) 23,370
Net cash provided by (used in) financing activities (8,484) 23,370
Net change in cash and cash equivalents (5,102) (3,264)
Cash and cash equivalents, beginning of year 11,023 4,212
Cash and cash equivalents, end of period 5,921 948
Non-Guarantor [Member]
    
Cash flows from operating activities:    
Net income (loss) (10,000) 10,661
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 10,853 12,024
Loss on extinguishment of debt     
Gain on disposition of assets (40) (74)
Deferred income tax expense 3,767 (2,156)
Expenses not requiring cash (1,647) (31)
Change in accounts receivable (3,992) (3,859)
Change in other assets (1,937) 689
Change in accrued income taxes 1,049 (98)
Change in liabilities 3,551 (1,953)
Net cash provided by (used in) operating activities 1,604 15,203
Cash flows from investing activities:    
Capital expenditures (8,025) (2,822)
Proceeds from the sale of assets 46 39
Net cash (used in) investing activities (7,979) (2,783)
Cash flows from financing activities:    
Intercompany advances, net 6,037 (17,220)
Net cash provided by (used in) financing activities 6,037 (17,220)
Net change in cash and cash equivalents (338) (4,800)
Cash and cash equivalents, beginning of year 34,612 37,987
Cash and cash equivalents, end of period 34,274 33,187
Eliminations [Member]
    
Cash flows from operating activities:    
Net income (loss) (179) (31,900)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Loss on extinguishment of debt     
Equity in net earnings of subsidiaries $ 179 $ 31,900