CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 8,811	$ 10,935
Accounts receivable, net	120,612	113,928
Prepaid expenses	3,297	2,476
Other current assets	7,032	4,000
Total current assets	139,752	131,339
Property and equipment, net	7,891	7,966
Goodwill	269,383	236,130
Intangible assets, net	53,408	46,105
Other non-current assets	3,930	3,823
Total assets	474,364	425,363
Current liabilities:
Accounts payable	18,793	22,035
Other current liabilities	37,783	33,028
Total current liabilities	56,576	55,063
Long-term debt	56,000	54,000
Other non-current liabilities	12,978	11,572
Total liabilities	$ 125,554	$ 120,635
Commitments and contingencies (see Note 12)
Stockholders' equity:
Common stock (par value $.001 per share; 50,000,000 shares authorized and 45,124,948 shares issued and 34,394,412 shares outstanding as of December 31, 2015; 43,174,676 shares issued and 32,854,802 shares outstanding as of December 31, 2014)	$ 45	$ 43
Additional paid-in capital	364,786	334,645
Accumulated other comprehensive loss	(1,875)	(651)
Treasury stock, at cost (10,730,536 shares as of December 31, 2015; 10,319,874 shares as of December 31, 2014)	(103,197)	(95,353)
Retained earnings	89,051	66,044
Total stockholders' equity	348,810	304,728
Total liabilities and stockholders' equity	$ 474,364	$ 425,363