Financial Derivatives - Outstanding Foreign Currency Forward Contracts and Options (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Option Contracts [Member] | Philippine Pesos [Member]
Derivative [Line Items]
Notional Amount	$ 59,000	$ 71,000
Settle Through Date	Dec. 31, 2014	Sep. 30, 2013
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Forwards [Member] | Philippine Pesos [Member]
Derivative [Line Items]
Notional Amount	63,300	5,000
Settle Through Date	Jul. 31, 2014	Aug. 31, 2013
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Forwards [Member] | Costa Rican Colones [Member]
Derivative [Line Items]
Notional Amount	41,600	60,750
Settle Through Date	Oct. 31, 2014	Dec. 31, 2013
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Forwards [Member] | Hungarian Forints [Member]
Derivative [Line Items]
Notional Amount	550	4,744
Settle Through Date	Jan. 31, 2014	Jan. 31, 2014
Derivatives Designated as Cash Flow Hedging Instruments under ASC 815 [Member] | Forwards [Member] | Romanian Leis [Member]
Derivative [Line Items]
Notional Amount	619	6,895
Settle Through Date	Jan. 31, 2014	Jan. 31, 2014
Derivatives Designated as Net Investment Hedging Instruments under ASC 815 [Member] | Forwards [Member] | Euros [Member]
Derivative [Line Items]
Notional Amount	32,657
Settle Through Date	Sep. 30, 2014
Derivatives Not Designated as Hedging Instruments under ASC 815 [Member] | Forwards [Member]
Derivative [Line Items]
Notional Amount	$ 59,207	$ 41,799
Settle Through Date	Jun. 30, 2014	Jun. 30, 2013