Financial Derivatives - Effect of Company's Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (4,543)	$ 4,400	$ (1,483)
Gain (Loss) Reclassified From Accumulated AOCI Into "Revenues" (Effective Portion)	(666)	4,156	1,853
Gain (Loss) Recognized in "Revenues" on Derivatives (Ineffective Portion)	119	17	2
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Foreign Currency Forward Contracts [Member] | Option Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(2,823)	4,400	(1,483)
Gain (Loss) Reclassified From Accumulated AOCI Into "Revenues" (Effective Portion)	(666)	4,156	1,853
Gain (Loss) Recognized in "Revenues" on Derivatives (Ineffective Portion)	119	17	2
Derivatives Designated as Net Investment Hedging Instruments under ASC 815 [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(1,720)
Gain (Loss) Reclassified From Accumulated AOCI Into "Revenues" (Effective Portion)
Gain (Loss) Recognized in "Revenues" on Derivatives (Ineffective Portion)
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in "Other income and (expense)" on Derivatives	$ 4,216	$ (295)	$ (1,444)