Fair Value Measurements, Financial Instruments, and Credit Risk - Additional Information (Detail)	3 Months Ended		6 Months Ended				1 Months Ended	3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2013 Fair Value Hedges Settlement date of September 9,2013 CAD	Jun. 30, 2013 Fair Value Hedges Settlement date of October 8,2013 CAD	Jun. 30, 2011 Interest Rate Swap Agreements USD ($)	Mar. 31, 2013 Interest Rate Swap Agreements USD ($)	Jun. 30, 2014 Net Investment Hedges USD ($)	Jun. 30, 2014 Net Investment Hedges USD ($)	Jun. 30, 2013 Net Investment Hedges USD ($)	Jun. 30, 2013 Net Investment Hedges TWD	Dec. 31, 2012 Net Investment Hedges Minimum EUR (€)	Dec. 31, 2012 Net Investment Hedges Maximum EUR (€)	Jun. 30, 2014 Foreign Currency Hedges USD ($)	Jun. 30, 2013 Foreign Currency Hedges USD ($)	Jun. 30, 2014 Foreign Currency Hedges USD ($)	Jun. 30, 2013 Foreign Currency Hedges USD ($)
Derivative [Line Items]
Interest rate swap agreement, notional amount					2,500,000	1,600,000	$ 75,000,000					450,000,000	€ 50,000,000	€ 100,000,000
Interest expense recognized								700,000
Agreement effective date							Jul. 15, 2011
Agreement maturity date							Jun. 15, 2014
Gain on effective portion forward contracts qualified for hedge	0	100,000	0	100,000
Loss on effective portion forward contracts qualified for hedge	0	100,000	0	100,000
Unrealized gain (loss) of net investment hedge				225,000					0	0	200,000
Forward contracts, expiration period										30 days
Aggregate gain (loss) on settlement of hedges															$ 200,000	$ 60,000	$ 400,000	$ 1,800,000