Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities:
Net income	$ 63,985	$ 86,243
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	124,154	122,085
Amortization of debt issuance costs and discounts	10,619	14,757
Loss on sale or disposal of property and equipment	8,129	6,139
Loss on early extinguishment of debt and write-off of discounts and deferred financing costs	32,429
Deferred income tax provision	31,930	58,273
Equity-based compensation	4,704	887
Changes in assets and liabilities:
Accounts receivable	(13,432)	(8,053)
Inventories	(1,299)	(4,215)
Prepaid expenses and other current assets	(67)	3,491
Accounts payable	(4,029)	(8,238)
Accrued salaries, wages and benefits	(11,788)	(8,014)
Deferred revenue	16,259	16,131
Other accrued expenses	15,168	20,161
Other assets and liabilities	(445)	3,001
Net cash provided by operating activities	276,317	302,648
Cash Flows From Investing Activities:
Capital expenditures	(125,852)	(154,976)
Change in restricted cash	49
Net cash used in investing activities	(125,803)	(154,976)
Cash Flows From Financing Activities:
Repayment of long-term debt	(185,742)	(52,451)
Repayment of note payable	(3,000)
Redemption premium payment	(15,400)
Proceeds from the issuance of debt	1,455	487,163
Proceeds from issuance of common stock, net of underwriter commissions	253,800
Repayment of revolving credit facility, net		(36,000)
Dividends paid to stockholders	(18,124)	(463,180)
Debt issuance costs	(13,968)	(7,024)
Offering costs	(4,694)
Net cash provided by (used in) financing activities	14,327	(71,492)
Change in Cash and Cash Equivalents	164,841	76,180
Cash and Cash Equivalents-Beginning of period	45,675	66,663
Cash and Cash Equivalents-End of period	210,516	142,843
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid	18,223	40,000
Capital expenditures in accounts payable	$ 24,449	$ 28,496