Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 261,340	$ 154,621
Restricted cash, current portion	2,363	2,383
Accounts receivable, less allowance for doubtful accounts of $69 and $197 at December 31, 2011 and June 30, 2012, respectively	18,026	15,647
Prepaid expenses and other current assets	13,001	7,178
Total current assets	294,730	179,829
Restricted cash, net of current portion	2,432	2,526
Property and equipment, net	23,157	19,014
Goodwill	75,822	46,233
Acquired intangible assets, net	34,535	12,555
Deferred tax asset	9,762	16,978
Other assets	1,763	1,561
Total assets	442,201	278,696
Current liabilities:
Accounts payable and accrued expenses	35,371	21,415
Customer obligations	212,834	169,959
Short-term contingent payment	14,269	8,976
Short-term debt	44,560	14,901
Other current liabilities	972	394
Total current liabilities	308,006	215,645
Warrants		1,119
Long-term contingent payment, net of current portion	6,805
Other non-current liabilities	2,619	1,820
Total liabilities	317,430	218,584
Stockholders equity (deficit):
Convertible preferred stock, $0.001 par value ($31,916 liquidation preference). Authorized 26,392 shares, outstanding 17,645 shares at December 31, 2011 and no shares outstanding at June 30, 2012		33,965
Common stock, $0.001 par value. Authorized 1,000,000 shares; issued 1,738 shares at December 31, 2011 and 26713 shares at June 30, 2012	27	2
Treasury stock at cost 192 shares at December 31, 2011 and 195 shares at June 30, 2012	(463)	(433)
Additional paid-in capital	194,593	19,029
Accumulated deficit	(69,386)	(74,620)
Total stockholders equity (deficit)	124,771	(22,057)
Total liabilities, redeemable convertible preferred stock, and stockholders equity (deficit)	442,201	278,696
Redeemable convertible preferred stock, Series C [Member]
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, series, value		36,570
Convertible Preferred Stock [Member]
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, series, value		82,169
Redeemable convertible preferred stock, Series D [Member]
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, series, value		17,771
Redeemable convertible preferred stock, Series E [Member]
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, series, value		$ 27,828