Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows From Operating Activities:
Net (loss) income	$ (202,386)	$ (12,531)	$ 49,133
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Goodwill impairment charge	269,332
Depreciation and amortization	163,294	199,649	182,503
Amortization of debt issuance costs and discounts	4,812	5,325	6,409
Loss on sale or disposal of assets	13,525	9,640	6,685
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs	8,143		20,905
Loss on derivatives		1	287
Deferred income tax (benefit) provision	(86,477)	8,937	23,246
Equity-based compensation	23,203	37,515	6,527
Changes in assets and liabilities:
Accounts receivable	(3,005)	2,110	(3,622)
Inventories	(3,285)	2,503	1,234
Prepaid expenses and other current assets	3,336	(3,196)	835
Accounts payable	7,347	3,600	2,523
Accrued salaries, wages and benefits	(6,456)	8,680	(6,738)
Deferred revenue	2,368	(1,536)	943
Other accrued expenses	(3,692)	12,281	(2,347)
Other assets and liabilities	2,398	7,434	(2,249)
Net cash provided by operating activities	192,457	280,412	286,274
Cash Flows From Investing Activities:
Capital expenditures	(172,517)	(160,518)	(157,302)
Acquisition of intangible assets			(120)
Change in restricted cash	(399)	232	45
Other investing activities	1,644
Net cash used in investing activities	(171,272)	(160,286)	(157,377)
Cash Flows From Financing Activities:
Repayment of long-term debt	(1,026,909)	(12,637)	(306,150)
Proceeds from draw on revolving credit facility	95,649	109,351	60,000
Repayment of revolving credit facility	(105,000)	(100,000)	(45,000)
Dividends paid to stockholders	(1,544)	(65,306)	(72,318)
Payment of tax withholdings on equity-based compensation through shares withheld	(2,088)	(1,629)	(843)
Exercise of stock options	11	82
Proceeds from the issuance of debt	998,306		280,000
Debt issuance costs	(15,390)		(4,571)
Redemption premium payment			(14,300)
Purchase of treasury stock			(50,650)
Net cash used in financing activities	(56,965)	(70,139)	(153,832)
Change in Cash and Cash Equivalents	(35,780)	49,987	(24,935)
Cash and Cash Equivalents—Beginning of year	68,958	18,971	43,906
Cash and Cash Equivalents—End of year	33,178	68,958	18,971
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid	470	908	430
Capital expenditures in accounts payable	$ 24,626	$ 19,080	$ 28,743