Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017	[1]
Cash flows from operating activities:
Net income (loss)	$ 41,925	$ 15,457		$ 26,639
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	79,445	42,057		30,294
Stock-based compensation expense	81,482	68,239		64,515
(Gain) loss from sale of building, investments and other assets and foreign currency, net	(314,513)	263		(238)
(Accretion) amortization on marketable debt securities, net	(4,883)	(2,730)		(636)
Noncash lease expense	11,167
Noncash interest expense	13,241
Noncash consideration received		(1,494)
Change in deferred income taxes and other	(16,762)	(3,366)		3,780
Changes in operating assets and liabilities:
Accounts receivable, net	(22,546)	22,625		(26,417)
Prepaid expenses and other assets	(15,057)	(18,417)		(8,124)
Accounts payable	(1,005)	(810)		(3,666)
Deferred revenue	234,681	62,338		(7,581)
Income tax payable	(10,176)	(2,116)		4,788
Operating lease and other liabilities	185,829	(13,806)		11,021
Net cash provided by (used in) operating activities	262,828	168,240		94,375
Cash flows from investing activities:
Purchases of investments	(1,568,216)	(333,832)		(348,594)
Maturities of investments	451,500	519,800		40,000
Sales of investments	44,890	89,168
Acquisition of property and equipment	(23,637)	(11,469)		(9,971)
Proceeds from sale of building and other property and equipment, net	580,679	33		273
Business acquisitions, net of cash acquired and restricted cash held in escrow	(301,815)	(222,440)		(101,201)
Release of restricted cash escrow from business acquisitions	(35,000)	(22,800)		(3,625)
Other investing activities, net	(266)	521		(8,163)
Net cash provided by (used in) investing activities	(851,865)	18,981		(431,281)
Cash flows from financing activities:
Proceeds from issuance of debt, net	672,152	99,100
Purchase of capped calls	(73,830)
Repayment of debt	(101,364)
Taxes paid related to net share settlement of stockholders' equity awards	(49,591)	(25,807)		(21,719)
Repurchases of common stock		(91,570)		(105,013)
Proceeds from issuance of common stock	17,488	9,969		8,769
Acquisition-related contingent consideration payment	(12,900)			(5,115)
Other financing activities, net	(324)
Net cash provided by (used in) financing activities	451,631	(8,308)		(123,078)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	10,739	(4,594)		3,945
Net change in cash, cash equivalents and restricted cash	(126,667)	174,319		(456,039)
Cash, cash equivalents and restricted cash, beginning of period	579,996	405,677	[1]	861,716
Cash, cash equivalents and restricted cash, end of period	453,329	579,996		405,677
Supplemental cash flow information:
Income taxes paid	22,350	16,111		$ 4,024
Interest paid	2,823
Noncash investing activities:
Acquisition-related common stock issuance	$ 253,903
Software acquired as noncash consideration		$ 1,494

[1] ^{Amounts retrospectively adjusted to reflect the adoption of ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash}