CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 194,433	$ 162,567
Short-term investments	602,559	0
Accounts receivable (net of allowances of $705 and $1,827 at June 30, 2015 and December 31, 2014, respectively)	86,960	43,938
Prepaid expenses and other current assets	7,514	6,015
Income tax receivable		6,797
Deferred income taxes	437	491
Total current assets	891,903	219,808
Noncurrent assets:
Property, equipment and capitalized software, net	53,817	50,962
Goodwill	62,269	62,269
Intangible assets, net	6,644	7,447
Other assets	1,645	2,083
Total assets	1,016,278	342,569
Current liabilities:
Accounts payable	10,322	10,974
Accrued compensation	13,912	15,305
Other current liabilities	2,082	1,992
Deferred revenue	2,433	3,904
Income tax payable	8,715
Deferred rent	624	567
Credit facilities	16,250	18,750
Capital lease obligation	117	99
Total current liabilities	54,455	51,591
Noncurrent liabilities:
Noncurrent credit facilities	273,750	281,250
Capital lease obligation, less current portion	272	168
Deferred rent	2,321	2,619
Deferred income taxes	12,314	15,163
Total liabilities	$ 343,112	$ 350,791
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Common stock
Preferred stock, $0.0001 par value, 100,000,000 shares authorized, zero shares issued and outstanding at June 30, 2015 and December 31, 2014 respectively
Additional paid in capital	$ 453,445	$ 110,317
Retained earnings	221,372	181,477
Treasury stock, at cost, zero shares at June 30, 2015 and 11,109,285 at December 31, 2014		(300,017)
Accumulated other comprehensive loss	(1,652)
Total stockholders' equity (deficit)	673,166	(8,222)
Total liabilities and stockholders' equity (deficit)	$ 1,016,278	$ 342,569
Common Class A
Stockholders' equity (deficit):
Common stock
Common Class B
Stockholders' equity (deficit):
Common stock	$ 1	$ 1