Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,678	$ 5,813
Accounts receivable, net	85,922	69,662
Prepaid expenses	2,071	1,649
Other current assets	3,747	3,717
Total current assets	96,418	80,841
Property and equipment, net	8,650	4,398
Goodwill	175,173	160,936
Intangible assets, net	22,387	17,350
Other non-current assets	3,373	3,669
Total assets	306,001	267,194
Current liabilities:
Accounts payable	11,291	7,959
Other current liabilities	26,382	20,605
Total current liabilities	37,673	28,564
Long-term debt	20,300	2,800
Other non-current liabilities	4,658	1,417
Total liabilities	62,631	32,781
Stockholders' equity:
Common stock (par value $.001 per share; 50,000,000 shares authorized and 39,142,277 shares issued and 30,800,986 shares outstanding as of March 31, 2013; 39,024,337 shares issued and 30,825,123 shares outstanding as of December 31, 2012)	40	39
Additional paid-in capital	287,701	276,201
Accumulated other comprehensive loss	(360)	(306)
Treasury stock, at cost (8,341,291 shares as of March 31, 2013; 8,199,214 shares as of December 31, 2012)	(74,145)	(62,970)
Retained earnings	30,134	21,449
Total stockholders' equity	243,370	234,413
Total liabilities and stockholders' equity	$ 306,001	$ 267,194