Foreign Currency Hedging (Schedule of Foreign Currency Exchange Contracts Designated as Cash Flow Hedges) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Fair Value	$ 243	$ (8,871)
Derivative, Notional Amount	38,268	111,614
Eurodollar Sell Forward Contract 1.240 [Member]
Derivative [Line Items]
Derivative, Forward Exchange Rate	1.240
Eurodollar Sell Forward Contract 1.270 [Member]
Derivative [Line Items]
Derivative, Forward Exchange Rate	1.270
Eurodollar Sell Forward Contract 1.281 [Member]
Derivative [Line Items]
Derivative, Forward Exchange Rate	1.281
Eurodollar Sell Forward Contract 1.300 [Member]
Derivative [Line Items]
Derivative, Forward Exchange Rate	1.300
Euro Forward Contracts [Member] | Eurodollar Sell Forward Contract 1.240 [Member]
Derivative [Line Items]
Fair Value	0	(1,207)
Derivative, Notional Amount	0	10,850
Euro Forward Contracts [Member] | Eurodollar Sell Forward Contract 1.270 [Member]
Derivative [Line Items]
Fair Value	35	(3,760)
Derivative, Notional Amount	17,780	44,450
Euro Forward Contracts [Member] | Eurodollar Sell Forward Contract 1.281 [Member]
Derivative [Line Items]
Fair Value	208	(2,785)
Derivative, Notional Amount	20,488	36,814
Euro Forward Contracts [Member] | Eurodollar Sell Forward Contract 1.300 [Member]
Derivative [Line Items]
Fair Value	0	(1,119)
Derivative, Notional Amount	$ 0	$ 19,500