Accounts Receivable, Net (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable	$ 58,878		$ 66,338
Trade notes receivable	5,375		4,979
Allowance for doubtful accounts	(986)		(963)
Accounts Receivable, Net, Total	$ 63,267	[1]	$ 70,354	[2]

[1] Restated and Revised, see Notes 2 and 7

[2] Revised, see Note 2