CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
OPERATING ACTIVITIES:
Net (loss) income	$ (85,635)	$ 123,825
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Stock-based compensation expense	11,880	11,557
Depreciation	58,269	61,851
Intangible amortization	58,570	69,183
Deferred income taxes	(137,935)	4,515
Asset impairment charges and loss on disposal of assets held for sale	13,177
Other, net	502	(634)
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:
Accounts receivable	5,176	(12,888)
Accounts payable	(4,538)	(1,496)
Accrued liabilities	333,827	(13,303)
Other assets and liabilities	(16,215)	2,830
Net Cash Provided by Operating Activities	237,078	245,440
INVESTING ACTIVITIES:
Payments for acquisitions, net of cash acquired	(21,159)	(42,097)
Capital expenditures	(63,092)	(67,133)
Proceeds from sale of property and equipment	409	1,355
Other		7
Net Cash Used in Investing Activities	(83,842)	(107,868)
FINANCING ACTIVITIES:
Repayments of long-term debt and other obligations	(33,344)	(31,789)
Proceeds from foreign bank debt	1,907	27,619
Repayments of foreign bank debt	(10,992)	(36,953)
Repayment of term loan	(50,000)	(250,000)
Proceeds from senior credit facility	899,029	902,817
Repayments of senior credit facility	(924,968)	(715,653)
Payments of capital lease obligations	(1,779)	(2,605)
Payments for repurchase of common stock		(40,814)
Proceeds from issuance of common stock	4,415	30,308
Payments for repurchase of convertible preferred stock	(22,135)	(5,025)
Dividends paid on mandatory convertible preferred stock	(18,549)	(20,127)
Payments to noncontrolling interests	(708)	(6,961)
Net Cash Used in Financing Activities	(157,124)	(149,183)
Effect of exchange rate changes on cash and cash equivalents	3,890	297
Net change in cash and cash equivalents	2	(11,314)
Cash and cash equivalents at beginning of period	44,189	55,634
Cash and Cash Equivalents at End of Period	44,191	44,320
NON-CASH ACTIVITIES:
Issuances of obligations for acquisitions	$ 15,164	$ 23,069