Derivative Financial Instruments - Summary of Impact of Derivative Financial Instruments on Consolidated Statement of Operations and Consolidated Statement of Comprehensive Income (Detail) (Net Investment Hedges [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 3,337
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	0	0
Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	3,337
Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Gain (Loss) on Sale of Subsidiary
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 0	$ 0