Schedule II-Valuation and Qualifying Accounts - (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]
Allowance for doubtful accounts, Balance at January 1	$ 1,040		$ 862		$ 965
Allowance for doubtful accounts additions	55	[1]	178	[1]	326	[1]
Allowance for doubtful accounts, Deductions	(204)	[1]	0	[1]	(429)	[1]
Allowance for doubtful accounts, Balance at December 31	891		1,040		862
Deferred tax asset valuation allowance, Balance at January 1	2,170		2,269		1,404
Valuation Allowance Additions	1,233	[2]	233	[2]	1,000	[2]
Deferred tax asset valuation allowance, Deductions	(268)	[2]	(332)	[2]	(135)	[2]
Deferred tax asset valuation allowance, Balance at December 31	$ 3,135		$ 2,170		$ 2,269

[1] These balances primarily reflect additions to the allowance charged to expense resulting from the normal course of business, less deductions for recovery of accounts that were previously reserved, and additions and deductions for foreign currency translation

[2] These balances primarily reflect additions for an increase in the valuation reserve associated with certain deferred tax assets related to the Netherlands defined-benefit plan