Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (62,202)	$ 65,392
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization of property and equipment	5,351	1,292
Amortization of intangible assets	84,475	18,126
Stock-based compensation expense	23,961	11,041
Bad debt expense	1,849	69
Amortization of debt issuance costs	1,818	0
Loss on disposal of property and equipment	46	0
Amortization of premium or discount on investments	329	2,128
Deferred income tax and other, net	(25,295)	14,170
Changes in operating assets and liabilities:
Accounts receivable	(1,214)	(925)
Unbilled contract receivable, net	42,019	0
Other assets	4,104	4,172
Accounts payable	(1,258)	(287)
Accrued legal fees	(2,484)	1,171
Accrued and other liabilities	10,587	(58)
Deferred revenue	3,683	(4,871)
Net cash from operating activities	85,769	111,420
Cash flows from investing activities:
Purchases of property and equipment	(2,487)	(2,960)
Purchases of short-term investments	(22,572)	(161,373)
Proceeds from sales of property and equipment	40	0
Proceeds from sales of short-term investments	1,035	43,436
Proceeds from maturities of short-term investments	8,400	130,570
Net cash from investing activities	(15,584)	9,673
Cash flows from financing activities:
Dividend paid	(29,664)	(29,442)
Repayment of debt	(4,500)	0
Proceeds from exercise of stock options	4,827	4,195
Proceeds from employee stock purchase program	4,132	1,998
Repurchase of common stock	(13,531)	(70,042)
Net cash from financing activities	(38,736)	(93,291)
Net increase in cash, cash equivalents and restricted cash	31,449	27,802
Cash and cash equivalents at beginning of period	65,626	22,599
Cash, cash equivalents and restricted cash at end of period	97,075	50,401
Supplemental disclosure of cash flow information:
Interest paid	21,258	0
Income taxes paid, net of refunds	$ 11,614	$ 14,698