Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 9,016	$ 8,811
Accounts receivable, net	116,428	120,612
Prepaid expenses	3,456	3,297
Other current assets	6,067	7,032
Total current assets	134,967	139,752
Property and equipment, net	7,781	7,891
Goodwill	269,606	269,383
Intangible assets, net	50,706	53,408
Other non-current assets	3,813	3,930
Total assets	466,873	474,364
Current liabilities:
Accounts payable	12,736	18,793
Other current liabilities	28,997	37,783
Total current liabilities	41,733	56,576
Long-term debt	56,000	56,000
Other non-current liabilities	13,507	12,978
Total liabilities	111,240	125,554
Stockholders' equity:
Common stock (par value $.001 per share; 50,000,000 shares authorized and 45,457,477 shares issued and 34,605,750 shares outstanding as of March 31, 2016; 45,124,948 shares issued and 34,394,412 shares outstanding as of December 31, 2015)	45	45
Additional paid-in capital	368,362	364,786
Accumulated other comprehensive loss	(1,683)	(1,875)
Treasury stock, at cost (10,851,727 shares as of March 31, 2016; 10,730,536 shares as of December 31, 2015)	(105,548)	(103,197)
Retained earnings	94,457	89,051
Total stockholders' equity	355,633	348,810
Total liabilities and stockholders' equity	$ 466,873	$ 474,364