Other Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Component of Other Income (Expense) Nonoperating [Line Items]
Other expense, net	$ (16)	$ (359)	$ (2,540)
Foreign exchange gains (losses), net
Component of Other Income (Expense) Nonoperating [Line Items]
Other expense, net	(16)	(462)	613
Change in fair value of acquisition-related contingent consideration
Component of Other Income (Expense) Nonoperating [Line Items]
Other expense, net	0	0	(3,222)
Other
Component of Other Income (Expense) Nonoperating [Line Items]
Other expense, net	$ 0	$ 103	$ 69