Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Prior period reclassification adjustments		$ 11,272	$ 11,039
Accounts receivable, allowance for doubtful accounts	8,695	8,482	9,743
Net foreign currency losses	$ (822)	$ (4,525)	$ (1,947)