Schedule of Interest and Other Income (Expense), Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and other income (expense), net
Interest and other (expense) income	$ (199)us-gaap_InterestAndOtherIncome	$ 1,911us-gaap_InterestAndOtherIncome	$ (1,358)us-gaap_InterestAndOtherIncome
Interest expense	(2,618)us-gaap_InterestExpense	(2,208)us-gaap_InterestExpense	(4,130)us-gaap_InterestExpense
Foreign exchange transaction gains	812	2,256	363
Total	$ (2,005)us-gaap_NonoperatingIncomeExpense	$ 1,959us-gaap_NonoperatingIncomeExpense	$ (5,125)us-gaap_NonoperatingIncomeExpense

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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