Hedging Activities and Fair Value Measurements - Additional Information (Detail)	3 Months Ended			12 Months Ended		3 Months Ended
	Mar. 31, 2013 USD ($) Y	Mar. 31, 2013 EUR (€)	Mar. 31, 2012 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 EUR (€)	Mar. 31, 2013 Minimum	Mar. 31, 2013 Maximum
Derivatives, Fair Value [Line Items]
Borrowings resulting in interest rate risk	$ 323,800,000
Foreign currency contracts maturity period, years	1	1
Number of fixed rate payor on interest rate swap contracts	6	6
Variable rate borrowings	175,000,000
Variable interest rate, lower range	0.30%	0.30%
Variable interest rate, higher range	2.20%	2.20%
Expiration dates						2013	2014
Expected reclassification of losses out of AOCI into earnings during the next 12 months	300,000
Variable rate borrowings outstanding	278,100,000	15,000,000
Number of foreign currency forward contracts outstanding	25	25
Notional amounts, lower range	100,000
Notional amounts, higher range	23,800,000
Net losses from foreign currency forward contracts	1,900,000		29,000
Total net foreign currency gains (losses)	800,000		1,500,000
Portion of EURO Term Loan designated as net investment hedge		15,000,000			22,500,000
Amount of gain loss recognized in other comprehensive income	500,000			(900,000)
Net balances of term loan designated as hedge included in accumulated other comprehensive income net of tax	$ 2,300,000			$ 2,800,000