Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 55,804	$ 138,260
Short-term investments	39,449	62,432
Accounts receivable, net	19,245	17,010
Unbilled contracts receivable	175,315	10,866
Other current assets	16,422	16,949
Total current assets	306,235	245,517
Long-term unbilled contracts receivable	65,013	2,930
Property and equipment, net	32,984	34,442
Intangible assets, net	378,055	431,789
Goodwill	385,784	385,574
Other assets	4,959	9,772
Total assets	1,173,030	1,110,024
Current liabilities:
Accounts payable	2,790	4,233
Accrued legal fees	7,503	7,483
Accrued liabilities	24,254	47,969
Current portion of long-term debt	0	34,451
Deferred revenue	4,106	2,686
Total current liabilities	38,653	96,822
Long-term deferred tax liabilities	64,545	15,085
Long-term debt, net	480,952	545,211
Other long-term liabilities	17,532	17,330
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock: $0.001 par value; 10,000 shares authorized and no shares issued and outstanding	0	0
Common stock: $0.001 par value; 150,000 shares authorized; 61,994 and 60,608 shares issued, respectively, and 48,962 and 49,103 shares outstanding, respectively	62	60
Additional paid-in capital	712,687	686,660
Treasury stock at cost: 13,032 and 11,505 shares of common stock at each period end, respectively	(352,667)	(319,397)
Accumulated other comprehensive loss	(456)	(303)
Retained earnings	211,722	68,556
Total stockholders’ equity	571,348	435,576
Total liabilities and stockholders’ equity	$ 1,173,030	$ 1,110,024