Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities:
Net loss	$ (236,979)	$ (66,281)
Adjustments to reconcile net loss to net cash provided by operating activities:
Goodwill impairment charges	269,332
Depreciation and amortization	78,367	115,756
Amortization of debt issuance costs and discounts	2,467	2,668
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs	8,143
Loss on sale or disposal of assets	1,948	6,719
Loss on derivatives		1
Deferred income tax benefit	(108,173)	(44,372)
Equity-based compensation	16,020	32,051
Changes in assets and liabilities:
Accounts receivable	(23,037)	(23,460)
Inventories	(9,544)	(10,821)
Prepaid expenses and other current assets	2,674	228
Accounts payable	25,755	18,179
Accrued salaries, wages and benefits	(8,204)	(639)
Deferred revenue	72,278	76,991
Other accrued expenses	(4,800)	4,301
Other assets and liabilities	2,056	416
Net cash provided by operating activities	88,303	111,737
Cash Flows From Investing Activities:
Capital expenditures	(103,175)	(103,224)
Change in restricted cash	(800)	198
Net cash used in investing activities	(103,975)	(103,026)
Cash Flows From Financing Activities:
Proceeds from the issuance of debt	998,306
Repayment of long-term debt	(1,015,056)	(8,425)
Proceeds from draw on revolving credit facility	80,649	70,000
Repayment of revolving credit facility	(65,000)	(20,000)
Debt issuance costs	(15,390)
Dividends paid to stockholders	(1,502)	(38,781)
Payment of tax withholdings on equity-based compensation through shares withheld	(1,470)	(1,324)
Exercise of stock options	11	82
Net cash (used in) provided by financing activities	(19,452)	1,552
Change in Cash and Cash Equivalents	(35,124)	10,263
Cash and Cash Equivalents—Beginning of period	68,958	18,971
Cash and Cash Equivalents—End of period	33,834	29,234
Supplemental Disclosures of Noncash Investing and Financing Activities
Capital expenditures in accounts payable	33,132	26,375
Dividends declared, but unpaid	$ 665	$ 18,849