Nature of Business and Significant Accounting Policies (Details 7) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Changes from Accumulated Other Comprehensive income [Abstract]
Pension plans, beginning balance	$ (1,717)
Pension plans adjustment, before reclassification	78
Pension plans, reclassification	24
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	341
Pension plans adjustment, after reclassification	102
Pension plans, ending balalnce	(1,615)
Cash flow hedges, beginning balance	323
Cash flow hedges adjustment, before reclassification	(357)
Cash flow hedges, reclassification	0
Cash flow hedges adjustment, after reclassification	(16)
Cash flow hedges, ending balance	307
Foreign currency translation, beginning balance	(123,732)
Foreign currency translation adjustment	(40,911)
Foreign currency translation, ending balance	(164,643)
Accumulated other comprehensive earnings, beginning balance	(125,126)
Other comprehensive earnings, before reclassifications	(41,190)
Other comprehensive earnings, reclassification	365
Other comprehensive earnings, after adjustment	(40,825)
Accumulated other comprehensive earnings, ending balance	$ (165,951)