Interest Expense and Other Income (Expense) - Components of Other Income (Expense) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Component of Other Expense, Nonoperating [Abstract]
Other income (expense)	$ 206	$ 353
CSV income [Member]
Component of Other Expense, Nonoperating [Abstract]
Other income (expense)	104	458
Foreign exchange expense [Member]
Component of Other Expense, Nonoperating [Abstract]
Other income (expense)	(16)	(97)
Other - net [Member]
Component of Other Expense, Nonoperating [Abstract]
Other income (expense)	$ 118	$ (8)