Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash Flows From Operating Activities:
Net (loss) income	$ (12,531)	$ 49,133	$ 49,919
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	199,649	182,503	176,275
Amortization of debt issuance costs and discounts	5,325	6,409	9,399
Loss on sale or disposal of assets	9,640	6,685	5,792
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs		20,905	461
Loss on derivatives	1	287
Deferred income tax provision	8,937	23,246	28,000
Equity-based compensation	37,515	6,527	2,349
Changes in assets and liabilities:
Accounts receivable	2,110	(3,622)	6,256
Inventories	2,503	1,234	2,709
Prepaid expenses and other current assets	(3,196)	835	(1,276)
Accounts payable	3,600	2,523	(8,791)
Accrued salaries, wages and benefits	8,680	(6,738)	(4,928)
Deferred revenue	(1,536)	943	(6,089)
Other accrued expenses	12,281	(2,347)	(763)
Other assets and liabilities	7,434	(2,249)	2,219
Net cash provided by operating activities	280,412	286,274	261,532
Cash Flows From Investing Activities:
Capital expenditures	(160,518)	(157,302)	(154,641)
Acquisition of intangible assets		(120)	(1,900)
Change in restricted cash	232	45	(5)
Net cash used in investing activities	(160,286)	(157,377)	(156,546)
Cash Flows From Financing Activities:
Repayment of long-term debt	(12,637)	(306,150)	(45,537)
Proceeds from draw on revolving credit facility	109,351	60,000	40,000
Repayment of revolving credit facility	(100,000)	(45,000)	(40,000)
Dividends paid to stockholders	(65,306)	(72,318)	(72,113)
Payment of tax withholdings on equity-based compensation through shares withheld	(1,629)	(843)	(213)
Exercise of stock options	82
Proceeds from the issuance of debt		280,000
Debt issuance costs		(4,571)
Redemption premium payment		(14,300)
Purchase of treasury stock		(50,650)	(60,058)
Net cash used in financing activities	(70,139)	(153,832)	(177,921)
Change in Cash and Cash Equivalents	49,987	(24,935)	(72,935)
Cash and Cash Equivalents—Beginning of period	18,971	43,906	116,841
Cash and Cash Equivalents—End of period	68,958	18,971	43,906
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid	908	430	172
Capital expenditures in accounts payable	$ 19,080	$ 28,743	25,730
Treasury stock purchases settled in January 2015			$ 5,650