Accrued and Other Liabilities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Royalties and other fulfillment costs	$ 16,648,000	$ 19,435,000
Employee compensation, commissions and benefits	11,821,000	13,368,000
Loss Contingency, Period of Occurrence	11,525,000.000
Loss Contingency, Settlement Agreement, Consideration		0
Sales, VAT and other taxes payable	8,449,000	10,959,000
Deferred tax liabilities-current	453,000	3,894,000
Accrued loss on excess office facilities, current portion	591,000	2,463,000
Other	8,537,000	7,411,000
Total accrued and other liabilities	$ 58,024,000	$ 57,530,000