Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 98,039	$ 99,237
Restricted cash	464	320
Accounts receivable, net of allowances of $4,642 and $4,773 as of March 31, 2014 and December 31, 2013, respectively	79,918	109,056
Prepaid expenses and other current assets	3,793	4,243
Total current assets	182,214	212,856
Long-term assets:
Property and equipment, net	15,032	12,663
Restricted cash	350	515
Goodwill	135,518	135,489
Intangible assets, net	55,433	57,706
Other assets	233	375
Total long-term assets	206,566	206,748
Total assets	388,780	419,604
Current liabilities:
Accounts payable and accrued expenses	10,272	7,617
Accrued cost of revenue	42,189	65,053
Accrued payroll and payroll related expenses	6,673	8,767
Deferred revenue	890	868
Total current liabilities	60,024	82,305
Other long-term liabilities	1,911	1,829
Total liabilities	61,935	84,134
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, no shares issued and outstanding as of March 31, 2014 and December 31, 2013
Common stock, $0.001 par value, 250,000,000 shares authorized, 106,837,523 and 106,314,909 shares issued and outstanding as of March 31, 2014 and December 31, 2013, respectively	107	106
Additional paid-in capital	405,066	400,716
Accumulated other comprehensive loss	(225)	(196)
Accumulated deficit	(78,103)	(65,156)
Total stockholders' equity	326,845	335,470
Total liabilities and stockholders' equity	$ 388,780	$ 419,604