Foreign Currency Forward Contracts Activity (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Net investment hedge CTA, net of tax	$ 317,459	$ 3,241
Cash flow hedge CTA, net of tax	1,412
Cash flow hedge CTA, tax	575	0	0
Cash flow hedge CTA, net of tax	2,080
Derivatives Designated as Hedging Instruments | Cash Flow Hedges
Derivative [Line Items]
Cash flow hedge CTA, tax	1,000
Cash flow hedge CTA, net of tax	2,000
Derivatives Designated as Hedging Instruments | Net Investment Hedging
Derivative [Line Items]
Net investment hedge CTA, tax	193,000
Net investment hedge CTA, net of tax	317,000
Maximum | Derivatives Designated as Hedging Instruments | Cash Flow Hedges
Derivative [Line Items]
Cash flow hedge CTA, tax	1,000
Cash flow hedge CTA, net of tax	$ 1,000