Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Cash Equivalents	$ 10,400	$ 5,600
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	10,364	5,616
Interest Rate Cash Flow Hedge Asset at Fair Value	976	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	1,371	1,912
Total Assets at Fair Value	12,711	7,528
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	126	1,292
Foreign Currency Cash Flow Hedge Liability at Fair Value	2,043	106
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	659	986
Total Liabilities at Fair Value	2,828	2,384
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	0	0
Total Assets at Fair Value	0	0
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	0	0
Foreign Currency Cash Flow Hedge Liability at Fair Value	0	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	0	0
Total Liabilities at Fair Value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Cash Equivalents	10,364	5,616
Interest Rate Cash Flow Hedge Asset at Fair Value	976	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	1,371	1,912
Total Assets at Fair Value	12,711	7,528
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	126	1,292
Foreign Currency Cash Flow Hedge Liability at Fair Value	2,043	106
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	659	986
Total Liabilities at Fair Value	2,828	2,384
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Cash Equivalents	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	0	0
Total Assets at Fair Value	0	0
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	0	0
Foreign Currency Cash Flow Hedge Liability at Fair Value	0	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	0	0
Total Liabilities at Fair Value	$ 0	$ 0