Condensed Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (6,404)	$ 32,449
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	53,980	49,209
Amortization of financing costs and discounts	6,997	2,965
Operating Lease Right of Use Asset Amortization	4,834	4,796
Share-based compensation	6,313	5,086
Provision for doubtful accounts	2,826	2,888
Deferred income taxes, net	(1,106)	548
Changes in fair value of contingent consideration	(240)	5,003
Foreign currency remeasurement loss	(7,801)	0
Loss on equity method investments	(4,269)	(628)
Debt and Equity Securities, Gain (Loss)	(20,826)	0
Decrease (increase) in:
Accounts receivable	52,949	41,926
Prepaid expenses and other current assets	(8,169)	(2,143)
Other assets	2,612	(144)
(Decrease) increase in:
Accounts payable and accrued expenses	(43,374)	(10,422)
Income taxes payable	1,616	(2,333)
Deferred revenue	(686)	(2,352)
Increase Decrease in Operating Lease Liabilities	(5,062)	(4,526)
Liability for uncertain tax positions	1,654	(5,464)
Other long-term liabilities	400	(1,260)
Net cash provided by operating activities	102,036	116,854
Cash flows from investing activities:
Payments to Acquire Equity Method Investments	(22,840)	(9,794)
Payments to Acquire Other Investments	843	0
Purchases of property and equipment	(26,885)	(12,531)
Acquisition of businesses, net of cash received	(18,701)	(59,339)
Proceeds from sale of assets	226	0
Purchases of intangible assets	(19)	0
Net cash used in investing activities	(69,062)	(81,664)
Cash flows from financing activities:
Repurchase of common stock	(62,966)	(1,177)
Exercise of stock options	952	5,259
Dividends paid	0	(21,758)
Deferred payments for acquisitions	(15,503)	(1,395)
Other	(839)	(205)
Net cash used in financing activities	(78,356)	(19,276)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(3,679)	1,224
Net change in cash and cash equivalents	(49,061)	17,138
Cash and cash equivalents at beginning of period	575,615	209,474
Cash and cash equivalents at end of period	$ 526,554	$ 226,612