Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (61,273)	$ (50,086)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation of property and equipment	3,437	3,614
Amortization of intangible assets	54,365	56,706
Stock-based compensation expense	14,627	15,585
Deferred income tax	(14,590)	(16,676)
Amortization of debt issuance costs and other	1,720	1,402
Changes in operating assets and liabilities:
Accounts receivable	(3,201)	(16,740)
Unbilled contracts receivable, net	66,891	32,430
Other assets	424	11,282
Accounts payable	(1,443)	(951)
Accrued legal fees	20	(1,341)
Accrued and other liabilities	(23,945)	7,504
Deferred revenue	2,203	3,073
Net cash from operating activities	39,235	45,802
Cash flows from investing activities:
Purchases of property and equipment	(2,024)	(1,938)
Acquisition, net of cash acquired	(500)	0
Purchases of intangible assets	(350)	0
Purchases of short-term investments	0	(11,975)
Proceeds from sales of short-term investments	8,540	1,035
Proceeds from maturities of short-term investments	14,200	4,650
Net cash from investing activities	19,866	(8,228)
Cash flows from financing activities:
Dividend paid	(19,689)	(19,740)
Repayment of debt	(100,000)	(3,000)
Proceeds from exercise of stock options	8,000	4,680
Proceeds from employee stock purchase program	3,402	1,155
Repurchase of common stock	(33,270)	(3,411)
Net cash from financing activities	(141,557)	(20,316)
Net increase (decrease) in cash, cash equivalents and restricted cash	(82,456)	17,258
Cash and cash equivalents at beginning of period	138,260	65,626
Cash, cash equivalents and restricted cash at end of period	55,804	82,884
Supplemental disclosure of cash flow information:
Interest paid	11,227	14,493
Income taxes paid, net of refunds	$ 8,306	$ 7,209