Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 9,766	$ (161,307)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, accretion, and amortization of intangible assets	133,716	134,106
Amortization of deferred financing costs and note discount	10,060	9,317
Share-based compensation expense	10,627	9,971
Deferred income tax (benefit)	1,895	(6,198)
Loss on disposal and impairment of assets	15,583	26,170
Other reserves and non-cash items	(753)	(1,182)
Goodwill and intangible asset impairment		194,521
Changes in assets and liabilities:
Decrease (increase) in accounts and notes receivable, net	17,477	(122)
Increase in prepaid expenses, deferred costs, and other current assets	(5,210)	(23,567)
Increase in inventory, net	(3,321)	(3,619)
Decrease (increase) in other assets	4,987	(4,338)
Increase (decrease) in accounts payable	2,397	(20,951)
Increase in accrued liabilities	2,973	21,364
Decrease in other liabilities	(15,615)	(1,731)
Net cash provided by operating activities	184,582	172,434
Cash flows from investing activities:
Additions to property and equipment	(73,357)	(111,424)
Acquisitions, net of cash acquired		(484,602)
Net cash used in investing activities	(73,357)	(596,026)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	478,023	968,365
Repayments of borrowings under revolving credit facility	(569,017)	(827,351)
Tax payments related to share-based compensation	(5,245)	(8,359)
Proceeds from borrowings of long-term debt		300,000
Debt issuance costs		(5,476)
Proceeds from exercises of stock options	14	105
Net cash (used in) provided by financing activities	(96,225)	427,284
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(404)	(4,178)
Net increase (decrease) in cash, cash equivalents and restricted cash	14,596	(486)
Cash, cash equivalents and restricted cash at beginning of period	99,817	105,747
Cash, cash equivalents and restricted cash at end of period	114,413	105,261
Supplemental disclosure of cash flow information:
Cash paid for interest	25,754	19,284
Cash (refund) paid for income taxes	$ (1,240)	$ 3,567