Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income (loss)	$ 68,978	$ 203,785	$ (618,702)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense	59,132	101,178	143,516
Amortization of operating lease right-of-use assets	29,394	44,078	80,203
Loss on impairment of assets	144	73,756	790,229
Gain on sales and disposal of subsidiaries, property and equipment and leases, net	(11,146)	(609,529)	(22,756)
Loss on derivative instruments	0	24,517	25,980
Payments for settlement of derivative contracts	0	0	(626)
Loss on debt extinguishment	0	77,999	610
Non-cash interest expense	1,591	6,761	17,450
Interest paid on deferred purchase price for acquisitions	0	0	(3,969)
Non-cash share-based compensation expense	8,776	10,172	13,298
Bad debt expense	21,972	34,370	117,867
Deferred income taxes	(530)	195,563	(185,652)
Unrealized foreign currency exchange loss (gain)	13,907	(7,033)	26,344
Non-cash loss from non-income tax contingencies	743	12,150	3,059
Payments for lease settlements	0	(46,804)	0
Other, net	6,086	1,106	408
Changes in operating assets and liabilities:
Receivables	(27,524)	(15,986)	(323,036)
Prepaid expenses and other assets	4,800	(17,433)	(28,504)
Accounts payable and accrued expenses	(10,464)	(45,329)	(47,200)
Income tax receivable/payable, net	31,330	(101,126)	99,563
Deferred revenue and other liabilities	(18,959)	(98,277)	171,474
Net cash provided by (used in) operating activities	178,230	(156,082)	259,556
Cash flows from investing activities
Purchase of property and equipment	(52,756)	(50,444)	(74,624)
Expenditures for deferred costs	(312)	(5,843)	(14,538)
Receipts from sales of discontinued operations, net of cash sold, property and equipment	83,414	2,150,820	676,569
Settlement of derivatives related to sale of discontinued operations and net investment hedge	0	(50,341)	0
Other, net	0	0	(7)
Net cash provided by investing activities	30,346	2,044,192	587,400
Cash flows from financing activities
Proceeds from issuance of long-term debt, net of original issue discount	496,253	46,493	528,382
Payments on long-term debt	(433,705)	(942,030)	(705,353)
Payments of deferred purchase price for acquisitions	0	0	(5,680)
Payments to purchase noncontrolling interests	0	0	(13,716)
Payments of special cash distributions, dividend, and dividend equivalent rights	(253,188)	(1,374,855)	0
Proceeds from exercise of stock options	13,216	3,411	25,716
Payments to repurchase common stock	(282,151)	(380,505)	(99,523)
Withholding of shares to satisfy tax withholding for vested stock awards and exercised stock options	(1,994)	(2,769)	(1,154)
Payments of call premiums and debt issuance costs	0	(32,980)	(779)
Distributions to noncontrolling interest holders	0	0	(609)
Net cash used in financing activities	(461,569)	(2,683,235)	(272,716)
Effects of exchange rate changes on Cash and cash equivalents and Restricted cash	1,202	(14,724)	(546)
Change in cash included in current assets held for sale	0	288,126	195,787
Net change in Cash and cash equivalents and Restricted cash	(251,791)	(521,723)	769,481
Cash and cash equivalents and Restricted cash at beginning of period	345,575	867,298	97,817
Cash and cash equivalents and Restricted cash at end of period	$ 93,784	$ 345,575	$ 867,298