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Stockholders' Equity (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary of Stock based compensation recorded in expense categories
Total Allocated Share-based Compensation Expense	$ 1,409	$ 1,412	$ 3,921	$ 3,093
Cost of services and fulfillment [Member]
Summary of Stock based compensation recorded in expense categories
Total Allocated Share-based Compensation Expense	835	678	2,213	1,325
Selling and marketing [Member]
Summary of Stock based compensation recorded in expense categories
Total Allocated Share-based Compensation Expense	207	294	638	686
General and administrative [Member]
Summary of Stock based compensation recorded in expense categories
Total Allocated Share-based Compensation Expense	$ 367	$ 440	$ 1,070	$ 1,082

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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