Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (376,431)	$ 45,425
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	87,087	59,818
Stock-based compensation expense	84,862	61,467
(Gain) loss from sale of building, investments and other assets and foreign currency, net	2,498	(314,093)
(Accretion) amortization on marketable debt securities, net	(2,249)	(2,231)
Noncash lease expense	11,776	6,773
Noncash interest expense	18,821	7,094
Change in deferred income taxes and other	(11,116)	(22,167)
Changes in operating assets and liabilities:
Accounts receivable, net	(28,474)	(32,436)
Prepaid expenses and other assets	6,468	3,509
Accounts payable	(4,656)	(2,839)
Deferred revenue	210,238	206,154
Income tax payable	19,331	(5,142)
Operating lease and other liabilities	205,108	157,447
Net cash provided by (used in) operating activities	223,263	168,779
Cash flows from investing activities:
Purchases of investments	(560,010)	(873,624)
Maturities of investments	1,024,568	40,500
Sales of investments	549,909	14,928
Acquisition of property and equipment	(16,074)	(18,799)
Proceeds from sale of building and other property and equipment, net	27	580,626
Business acquisitions, net of cash acquired and restricted cash held in escrow	(791,096)	(301,816)
Release of restricted cash escrow from business combinations	(30,000)	(10,000)
Other investing activities, net	(1,456)
Net cash provided by (used in) investing activities	175,868	(568,185)
Cash flows from financing activities:
Proceeds from issuance of debt, net		672,152
Purchase of capped calls		(73,830)
Taxes paid related to net share settlement of stockholders' equity awards	(42,934)	(38,428)
Proceeds from issuance of common stock	16,130	12,521
Repayment of debt		(101,364)
Acquisition-related contingent consideration payments	(63,600)	(12,900)
Other financing activities, net		(324)
Net cash provided by (used in) financing activities	(90,404)	457,827
Effect of exchange rate changes on cash, cash equivalents and restricted cash	11,404	6,035
Net change in cash, cash equivalents and restricted cash	320,131	64,456
Cash, cash equivalents and restricted cash, beginning of period	453,329	579,996
Cash, cash equivalents and restricted cash, end of period	773,460	644,452
Noncash investing activity:
Acquisition-related common stock issuance	1,137,673	$ 253,903
Acquisition-related deferred purchase consideration	$ 23,807