Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net loss	$ (120,353)	$ (102,446)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	64,514	66,207
Loss on disposal of property and equipment	345	947
(Gain) loss on derivative instruments	(12,267)	9,999
Loss on debt extinguishment	467	0
Non-cash interest expense	12,233	16,478
Non-cash share-based compensation expense	22,388	7,164
Bad debt expense	16,502	25,839
Deferred income taxes	(15,882)	(19,977)
Unrealized foreign currency exchange loss (gain)	1,079	(26,061)
Non-cash loss from non-income tax contingencies	4,037	4,785
Other, net	1,919	1,472
Changes in operating assets and liabilities:
Restricted cash	(3,432)	(3,364)
Receivables	(267,480)	(244,587)
Prepaid expenses and other assets	(43,773)	(27,784)
Accounts payable and accrued expenses	(51,855)	(47,392)
Income tax receivable/payable, net	(8,907)	18,207
Deferred revenue and other liabilities	360,635	231,214
Net cash used in operating activities	(39,830)	(89,299)
Cash flows from investing activities
Purchase of property and equipment	(37,147)	(39,763)
Expenditures for deferred costs	(3,476)	(3,589)
Receipts from sale of property and equipment	126	7,714
Property insurance recoveries	370	0
Payments (to) from related parties	(347)	1,284
Change in restricted cash and investments	(1,114)	(985)
Net cash used in investing activities	(41,588)	(35,339)
Cash flows from financing activities
Proceeds from issuance of long-term debt	6,790	172,144
Payments on long-term debt	(50,335)	(133,079)
Payments of deferred purchase price for acquisitions	(5,315)	(7,443)
Payments to purchase noncontrolling interests	0	(668)
Proceeds from issuance of convertible redeemable preferred stock, net of issuance costs	55,290	0
Payment of dividends to noncontrolling interest holders	0	(89)
Proceeds from initial public offering, net of issuance costs	456,888	0
Proceeds from exercise of stock options	0	245
Withholding of shares to satisfy tax withholding for vested stock awards and exercised stock options	0	(107)
Payments of debt issuance costs and modification fees	(600)	(1,013)
Noncontrolling interest holder's loan to subsidiaries	943	0
Capital contributions from and (distributions to) noncontrolling interest holders	454	(860)
Net cash provided by financing activities	464,115	29,130
Effects of exchange rate changes on cash	8,644	7,325
Change in cash included in current assets held for sale	0	(5,892)
Net change in cash and cash equivalents	391,341	(94,075)
Cash and cash equivalents at beginning of period	464,965	458,673
Cash and cash equivalents at end of period	$ 856,306	$ 364,598