Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities:
Net income (loss)	$ 44,788	$ (202,386)	$ (12,531)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Goodwill impairment charge		269,332
Depreciation and amortization	160,955	163,294	199,649
Amortization of debt issuance costs and discounts	4,461	4,812	5,325
Loss on sale or disposal of assets, net	19,681	13,525	9,640
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs	8,150	8,143
Loss on derivatives			1
Deferred income tax provision (benefit)	16,894	(86,477)	8,937
Equity-based compensation	22,152	23,203	37,515
Changes in assets and liabilities:
Accounts receivable	(24,347)	(3,005)	2,110
Inventories	(4,620)	(3,285)	2,503
Prepaid expenses and other current assets	(2,275)	3,336	(3,196)
Accounts payable and accrued expenses	13,317	7,347	3,600
Accrued salaries, wages and benefits	6,051	(6,456)	8,680
Deferred revenue	25,611	2,368	(1,536)
Other accrued liabilities	3,417	(3,692)	12,281
Other assets and liabilities	(300)	2,398	7,434
Net cash (used in) provided by operating activities	293,935	192,457	280,412
Cash Flows From Investing Activities:
Capital expenditures	(179,770)	(172,517)	(160,518)
Other investing activities, net	(259)	1,644
Net cash (used in) provided by investing activities	(180,029)	(170,873)	(160,518)
Cash Flows From Financing Activities:
Proceeds from the issuance of debt	543,935	998,306
Repayments of long-term debt	(565,592)	(1,026,909)	(12,637)
Proceeds from draw on revolving credit facility	95,000	95,649	109,351
Repayments of revolving credit facility	(80,000)	(105,000)	(100,000)
Dividends paid to stockholders	(325)	(1,544)	(65,306)
Payment of tax withholdings on equity-based compensation through shares withheld	(3,977)	(2,088)	(1,629)
Exercise of stock options	4,282	11	82
Debt issuance costs	(8,086)	(15,390)
Purchase of treasury stock	(98,032)
Other financing activities	(101)
Net cash provided by (used in) financing activities	(112,896)	(56,965)	(70,139)
Change in Cash and Cash Equivalents, including Restricted Cash	1,010	(35,381)	49,755
Cash and Cash Equivalents, including Restricted Cash—Beginning of year	33,997	69,378	19,623
Cash and Cash Equivalents, including Restricted Cash—End of year	35,007	33,997	69,378
Supplemental Disclosures of Noncash Investing and Financing Activities
Capital expenditures in accounts payable and accrued expenses	30,760	24,626	19,080
Dividends declared, but unpaid	$ 84	$ 470	$ 908