Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 194,265	$ 171,545
Adjustments to reconcile net income to net cash provided by (uesd in) operating activities:
Depreciation and amortization	47,644	67,762
Amortization of operating lease right-of-use assets	33,374
Gain on sales of subsidiaries and disposal of property and equipment, net	(246,803)	(297,479)
(Gain) loss on derivative instruments	(5,343)	19,132
Payments for settlement of derivative contracts	(8,233)	0
Loss on debt extinguishment	10,622	7,481
Non-cash interest expense	5,076	4,645
Non-cash share-based compensation expense	3,149	(3,756)
Bad debt expense	23,650	22,153
Deferred income taxes	8,835	(26,560)
Unrealized foreign currency exchange loss	5,458	1,082
Non-cash loss from non-income tax contingencies	4,561
Other, net	1,537	(315)
Changes in operating assets and liabilities:
Receivables	(264,944)	(268,434)
Prepaid expenses and other assets	(62,433)	(20,158)
Accounts payable and accrued expenses	(47,929)	(61,087)
Income tax receivable/payable, net	(45,012)	(14,810)
Deferred revenue and other liabilities	387,500	389,602
Net cash provided by (used in) operating activities	44,974	(7,076)
Cash flows from investing activities
Purchase of property and equipment	(32,319)	(44,245)
Expenditures for deferred costs	(3,488)	(3,365)
Receipts from sales of discontinued operations and property and equipment, net of cash sold	330,998	359,510
Settlement of derivatives related to sale of discontinued operations	0	(9,960)
Business acquisitions, net of cash acquired	(1,194)	0
Payments from related parties	87	750
Net cash provided by investing activities	294,084	302,690
Cash flows from financing activities
Proceeds from issuance of long-term debt, net of original issue discount	90,630	188,563
Payments on long-term debt	(532,592)	(541,812)
Payments of deferred purchase price for acquisitions	(369)	(5,534)
Payments to purchase noncontrolling interests	0	(127)
Payment of dividends on Series A Preferred Stock	0	(9,719)
Withholding of shares to satisfy tax withholding for vested stock awards	(1,420)	(803)
Payments of debt issuance costs and redemption premiums	(5,226)	(148)
(Distributions to) contributions from noncontrolling interest holders	(625)	581
Net cash used in financing activities	(449,602)	(368,999)
Effects of exchange rate changes on Cash and cash equivalents and Restricted cash	2,045	22,150
Change in cash included in current assets held for sale	1,124	(100)
Net change in Cash and cash equivalents and Restricted cash	(107,375)	(51,335)
Cash and cash equivalents and Restricted cash at beginning of period	589,790	532,782
Cash and cash equivalents and Restricted cash at end of period	$ 482,415	$ 481,447