Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 4,731	$ 7,018
Accounts receivable, net	86,242	78,887
Prepaid expenses	2,813	2,569
Other current assets	6,373	6,759
Total current assets	100,159	95,233
Property and equipment, net	7,578	7,709
Goodwill	221,596	193,510
Intangible assets, net	43,330	25,487
Other non-current assets	3,861	3,810
Total assets	376,524	325,749
Current liabilities:
Accounts payable	6,674	7,667
Other current liabilities	25,718	30,298
Total current liabilities	32,392	37,965
Long-term debt	50,000	19,000
Other non-current liabilities	17,016	9,294
Total liabilities	99,408	66,259
Stockholders' equity:
Common stock (par value $.001 per share; 50,000,000 shares authorized and 41,871,305 shares issued and 32,240,898 shares outstanding as of March 31, 2014; 40,843,435 shares issued and 31,341,276 shares outstanding as of December 31, 2013)	42	41
Additional paid-in capital	314,988	297,997
Accumulated other comprehensive loss	(460)	(378)
Treasury stock, at cost (9,629,425 shares as of March 31, 2014; 9,512,545 shares as of December 31, 2013)	(83,380)	(81,051)
Retained earnings	45,926	42,881
Total stockholders' equity	277,116	259,490
Total liabilities and stockholders' equity	$ 376,524	$ 325,749