Summary of Gain or Loss Recognized and Amounts and Location of Income or Expense and Gain or Loss Reclassified into Income for Interest Rate Contracts and Foreign Currency Contracts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Interest rate agreements | Interest Expense
Derivative [Line Items]
Gain(Loss) recognized in Other comprehensive Income		$ (38,797)
Income (Expense) and Gain (Loss) Reclassified into Income	(7,637)	(6,197)
Income Statement Caption	Interest expense
Interest rate agreements | Other Expense
Derivative [Line Items]
Income (Expense) and Gain (Loss) Reclassified into Income		(786)
Income Statement Caption	Other expense
Foreign Exchange Contract | Foreign Exchange Contracts
Derivative [Line Items]
Gain(Loss) recognized in Other comprehensive Income		(55)
Income (Expense) and Gain (Loss) Reclassified into Income		$ 227
Income Statement Caption	Sales