Other Expense (Income), Net (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Component of Operating Other Cost and Expense [Line Items]
Foreign exchange transaction losses	$ 2,679,000	$ 1,713,000	$ 3,331,000
Other (income) expense, net	490,000	7,327,000	(1,549,000)
Total other expense (income), net	3,169,000	9,040,000	1,782,000
Nonoperating Income (Expense)		600,000
Interest Rate Swap [Member]
Component of Operating Other Cost and Expense [Line Items]
Derivative, notional amount		2,900,000
Treasury Rate Lock
Component of Operating Other Cost and Expense [Line Items]
Derivative, notional amount		$ 3,800,000