Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ (14,460)	$ 10,005
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	6,310	6,056
Amortization of intangible assets	16,963	770
Net losses from investments	61	62
Deferred income taxes	(9,257)	(1,305)
Stock-based compensation	8,605	6,191
Operating lease right-of-use asset amortization and impairments	9,647
Amortization of deferred financing fees	720
Amortization of discount on investments		(17)
Foreign currency losses	524	462
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	33,384	31,857
Deferred commissions	2,036	3,716
Prepaid expenses and other current assets	(610)	(68)
Accounts payable	828	19
Accrued expenses and other liabilities	(6,550)	(12,111)
Deferred revenue	6,532	(8,205)
Operating lease liabilities	(9,111)
Net cash provided by operating activities	45,622	37,432
Cash flows from investing activities:
Acquisitions, net of cash acquired	(237,684)	(9,250)
Purchases of property and equipment	(8,362)	(3,161)
Purchases of marketable investments		(31,831)
Proceeds from sales and maturities of marketable investments		33,802
Other investing activity	29
Net cash used in investing activities	(246,017)	(10,440)
Cash flows from financing activities:
Proceeds from borrowings, net of costs	171,275
Payments on borrowings	(40,688)
Payment of debt issuance costs	(857)
Deferred acquisition payments	(2,802)
Dividends paid on common stock		(10,839)
Repurchases of common stock		(9,946)
Proceeds from issuance of common stock under employee equity incentive plans	5,589	11,217
Taxes paid related to net share settlements of stock-based compensation awards	(2,232)	(2,509)
Net cash provided by (used in) financing activities	130,285	(12,077)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,212)	(2,648)
Net change in cash, cash equivalents and restricted cash	(71,322)	12,267
Cash and cash equivalents, beginning of period	140,296	79,790
Cash, cash equivalents and restricted cash, end of period	68,974	92,057
Supplemental disclosure of cash flow information:
Cash paid for interest	5,466
Cash paid for income taxes	$ 3,305	$ 3,263