Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 18,785	$ (25,430)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation of property and equipment	1,729	1,668
Amortization of intangible assets	22,509	25,459
Stock-based compensation expense	7,987	7,623
Deferred income taxes	(2,064)	(14,689)
Allowance for credit losses	1,944	(204)
Other	1,354	1,068
Changes in operating assets and liabilities:
Accounts receivable	(8,318)	(11,545)
Unbilled contracts receivable, net	(6,022)	47,262
Other assets	(739)	697
Accounts payable	(760)	(991)
Accrued and other liabilities	(5,212)	(16,795)
Deferred revenue	1,451	(302)
Net cash from operating activities	32,644	13,821
Cash flows from investing activities:
Purchases of property and equipment	(688)	(858)
Proceeds from sales of investments	3,345	0
Proceeds from maturities of investments	8,500	9,490
Net cash from investing activities	11,157	8,632
Cash flows from financing activities:
Dividend paid	(10,036)	(9,822)
Repayment of debt	0	(50,000)	$ (150,000)
Proceeds from exercise of stock options	1	253
Proceeds from employee stock purchase program	3,232	3,111
Repurchase of common stock	(3,144)	(3,131)
Net cash from financing activities	(9,947)	(59,589)
Net increase (decrease) in cash and cash equivalents	33,854	(37,136)
Cash and cash equivalents at beginning of period	74,551	113,625	113,625
Cash and cash equivalents at end of period	108,405	76,489	$ 74,551
Supplemental disclosure of cash flow information:
Interest paid	3,637	6,044
Income taxes paid, net of refunds	$ 5,637	$ 5,599