Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash from operating activities
Net income	$ 158,916	$ 31,854
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,751	16,169
Amortization of operating lease right-of-use assets	2,973	3,016
Deferred income taxes	22,878	(27,032)
Stock-based compensation	6,808	5,431
Gain on sale of business	(187,636)	0
Other	170	136
Changes in operating assets and liabilities:
Accounts receivable	(2,229)	(2,778)
Prepaid expenses and other current assets	(859)	(4,403)
Other assets	(320)	1,129
Accounts payable	695	270
Accrued employee expenses	1,919	486
Accrued expenses	5,931	(14)
Deferred revenue	815	1,039
Operating lease liabilities	(1,135)	(2,886)
Other liabilities	16,539	996
Net cash provided by operating activities	45,216	23,413
Cash from investing activities
Purchases of available-for-sale investments	(29,879)	(10,690)
Proceeds from sales of available-for-sale investments	13,942	2,750
Proceeds from maturities of available-for-sale investments	13,300	11,000
Purchases of property, equipment and intangible assets	(16,551)	(4,115)
Additions to capitalized software	(19,697)	(15,669)
Cash paid in business acquisition, net of cash acquired	0	(54,004)
Proceeds from sale of business, net of cash divested	191,427	0
Net cash provided by (used in) investing activities	152,542	(70,728)
Cash from financing activities
Proceeds from stock option exercises	402	259
Tax withholding for net share settlement	(10,959)	(5,541)
Payment of contingent consideration	(5,977)	0
Proceeds from issuance of debt	50,752	1,697
Principal payments on debt	(99,565)	(2,634)
Payment of debt issuance costs	0	(420)
Purchase of treasury stock	(4,194)	0
Net cash used in financing activities	(69,541)	(6,639)
Net increase (decrease) in cash, cash equivalents and restricted cash	128,217	(53,954)
Cash, cash equivalents and restricted cash
Beginning of period	16,247	74,506
End of period	144,464	20,552
Noncash investing and financing activities
Purchases of property and equipment included in accounts payable and accrued expenses	1,748	1,613
Additions of capitalized software included in accrued and accrued employee expenses	756	601
Stock-based compensation capitalized for software development	1,535	1,321
Purchase consideration for acquisitions included in other current liabilities	0	5,977
Total cash, cash equivalents and restricted cash	$ 144,464	$ 20,552