Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 14,263	$ 35,473
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, accretion, and amortization of intangible assets	89,303	64,731
Amortization of deferred financing costs and note discount	6,122	5,764
Share-based compensation expense	5,820	9,138
Deferred income taxes	(66)	7,435
Loss (gain) on disposal and impairment of assets	3,863	(944)
Other reserves and non-cash items	1,133	(42)
Changes in assets and liabilities:
Decrease (increase) in accounts and notes receivable, net	2,479	(2,215)
Increase in prepaid expenses, deferred costs, and other current assets	(11,814)	(7,716)
(Increase) decrease in inventory, net	(1,222)	2,522
(Increase) decrease in other assets	(13,222)	2,031
(Decrease) increase in accounts payable	(25,435)	4,558
Increase in accrued liabilities	21,894	11,204
Decrease in other liabilities	(8,539)	(7,352)
Net cash provided by operating activities	84,579	124,587
Cash flows from investing activities:
Additions to property and equipment	(69,868)	(39,571)
Acquisitions, net of cash acquired	(487,077)	(14,544)
Proceeds from sale of assets and businesses		9,348
Net cash used in investing activities	(556,945)	(44,767)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	835,505	134,307
Repayments of borrowings under revolving credit facility	(666,256)	(216,000)
Proceeds from borrowings of long-term debt	300,000
Debt issuance costs	(5,197)
Tax payments related to share-based compensation	(7,820)
Proceeds from exercises of stock options	105	145
Additional tax (expense) related to share-based compensation		(343)
Repurchase of common shares		(3,959)
Net cash provided by (used in) financing activities	456,337	(85,850)
Effect of exchange rate changes on cash	(4,328)	(615)
Net decrease in cash and cash equivalents	(20,357)	(6,645)
Cash and cash equivalents as of beginning of period	73,534	26,297
Cash and cash equivalents as of end of period	53,177	19,652
Supplemental disclosure of cash flow information:
Cash paid for interest	11,460	7,362
Cash paid for income taxes	$ 3,570	$ 8,374