Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (30,971)	$ 18,185	$ (21,919)	$ (3,714)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			167,333	174,880
Non-cash operating lease costs			7,248	9,043
Share-based compensation			24,393	20,806
Provision for credit losses on accounts receivable			2,296	(1,142)
Deferred income taxes, net			(25,658)	(13,552)
Gain on extinguishment of debt	0	(10,112)	0	(11,505)
Goodwill impairment on business	56,850	27,369	56,850	27,369
Changes in fair value of contingent consideration			0	(2,305)
Loss from equity method investments			9,665	10,077
Unrealized loss on short-term investments held at the reporting date, net			29,560	14,165
(Gain) loss on investments, net			(357)	47,772
Other			5,113	2,320
Decrease (increase) in:
Accounts receivable (includes $0 and $9,425 with related parties)			11,043	85,121
Prepaid expenses and other current assets			(10,059)	3,177
Other assets			(7,961)	(8,667)
Increase (decrease) in:
Accounts payable			1,955	(11,445)
Deferred revenue			(6,820)	(25,400)
Accrued liabilities and other current liabilities			(14,839)	(23,781)
Net cash provided by operating activities			227,843	293,219
Cash flows from investing activities:
Purchases of property and equipment			(82,476)	(80,767)
Acquisition of businesses, net of cash received			(9,492)	(104,094)
Investment in available-for-sale securities			0	(15,000)
Purchases of equity investments			(11,790)	0
Proceeds from sale of equity investments			3,174	0
Other			(4,154)	0
Net cash used in investing activities			(104,738)	(199,861)
Cash flows from financing activities:
Payment of debt			0	(166,904)
Proceeds from term loan			0	112,286
Debt extinguishment costs			0	(756)
Repurchase of common stock			(107,341)	(76,545)
Issuance of common stock under employee stock purchase plan			4,725	5,235
Proceeds from exercise of stock options			0	148
Deferred payments for acquisitions			(14,141)	(14,734)
Other			(53)	(559)
Net cash used in financing activities			(116,810)	(141,829)
Effect of exchange rate changes on cash and cash equivalents			1,536	(24,454)
Net change in cash and cash equivalents			7,831	(72,925)
Cash and cash equivalents at beginning of period			652,793	694,842	$ 694,842
Cash and cash equivalents at end of period	$ 660,624	$ 621,917	$ 660,624	$ 621,917	$ 652,793