Derivative Instruments - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014 Swap Agreement [Member]	Sep. 30, 2010 Cross-currency swap [Member] Designated as Hedging Instrument [Member] Pay Euros [Member] EUR (€)	Sep. 30, 2010 Cross-currency swap [Member] Designated as Hedging Instrument [Member] Receive U.S. dollars [Member] USD ($)
Derivatives, Fair Value [Line Items]
Notional amount		€ 28.7	$ 39.5
Fixed rate (as a percent)		5.00%	4.635%
Swap agreement expiration date	Dec. 30, 2016

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant