Balance Sheet Details - Accounts Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 42,086	$ 42,766
Allowance for doubtful accounts	(1,074)	(1,055)
Accounts receivables, net	$ 41,012	$ 41,711