Summary of Accrued Expenses and Other Current Liabilities (Details) (USD $)	Dec. 31, 2012		Dec. 31, 2011
Accrued Expenses And Other Current Liabilities [Abstract]
Accrued compensation and benefits	$ 19,714,000		$ 28,680,000
Fulfillment, freight, and duties	8,621,000		7,151,000
Professional services	13,588,000		8,429,000
Sales/use and VAT tax payable	12,444,000		9,642,000
Entrusted loan payable	7,943,000	[1]	9,133,000	[1]
Accrued rent and occupancy	10,226,000		5,476,000
Other	8,835,000	[2]	7,995,000	[2]
Total accrued expenses and other current liabilities	81,371,000		76,506,000
Percent Of Decision Point On Reporting Individual Items In Accrued Expenses	5.00%		5.00%
Entrusted Loan Receivable	$ 7,900,000		$ 9,100,000

[1] A corresponding entrusted loan receivable of $7.9 million and $9.1 million are recorded in Prepaid expenses and other current assets as of December 31, 2012 and 2011, respectively, as amounts are related to our subsidiaries in China.

[2] The amounts in Other consist of various accrued expenses and no individual item accounted for more than 5% of the total balance at December 31, 2012 or December 31, 2011.