Derivative Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2012 EUR (€)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets USD ($)	Dec. 31, 2012 Prepaid Expenses and Other Current Assets USD ($)	Dec. 31, 2012 Other Long Lived Assets USD ($)
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, notional amount	$ 10,600,000	$ 22,200,000	€ 7,700,000	€ 16,800,000
Derivative assets					372,000	30,000	21,000
Foreign currency forward contracts unrealized gain (loss)	261,000	51,000
Foreign currency forward contracts realized gain (loss)	$ 60,000	$ 0