CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net loss	$ (25,762)	$ (12,269)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	43,159	20,034
Accretion of debt discount and amortization of debt issuance costs	4,687	2,543
Amortization (accretion) of purchased investment premium or discount, net	41	(725)
Net foreign currency and other loss	7,990	1,115
Stock-based compensation expense	37,273	36,196
Deferred income taxes	(30,636)	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	21,334	21,874
Deferred commissions	(3,204)	(8,730)
Prepaid expenses and other assets	9,320	6,954
Accounts payable	3,798	1,606
Accrued expenses	2,493	(9,719)
Deferred revenue	(42,911)	(32,574)
Other liabilities	1,180	2,172
Net cash provided by operating activities	28,762	28,477
Cash flows from investing activities
Purchases of marketable investments	(20,419)	(82)
Maturities and sales of investments	272,173	197,774
Capital expenditures	(2,275)	(9,274)
Capitalized software costs	(13,524)	(14,127)
Cash paid for acquisitions, net of cash acquired	(1,298,172)	0
Net cash (used in) provided by investing activities	(1,062,217)	174,291
Cash flows from financing activities
Proceeds from term loan debt, net of discount	979,582	0
Payments of debt issuance and modification costs	(30,268)	0
Proceeds from employee stock plans	12,627	14,211
Payment of tax withholdings for employee stock plans	0	(5,469)
Net cash provided by financing activities	961,941	8,742
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(2,788)	0
Net (decrease) increase in cash, cash equivalents, and restricted cash	(74,302)	211,510
Cash, cash equivalents, and restricted cash at beginning of period	215,907	183,596
Cash, cash equivalents, and restricted cash at end of period	141,605	395,106
Supplemental cash flow data
Cash paid for interest	8,684	8,731
Cash paid for income taxes	2,543	970
Non-cash investing and financing activities:
Assets acquired under capital leases and other financing arrangements	0	1,702
Capitalized assets financed by accounts payable and accrued expenses	275	2,728
Capitalized stock-based compensation	4,115	2,113
Issuance of common stock for partial consideration for acquisition	32,889	0
Increase in debt discount as a result of modification of Convertible Notes	18,598	0
Reconciliation of cash, cash equivalents, and restricted cash
Total cash, cash equivalents, and restricted cash	$ 141,605	$ 395,106