Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Cash Equivalents	$ 28,700	$ 21,500
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	28,669	21,513
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	1,071	791
Total Assets at Fair Value	29,740	22,304
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	3,040	3,630
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	758	2,123
Total Liabilities at Fair Value	3,798	5,753
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	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 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	28,669	21,513
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	1,071	791
Total Assets at Fair Value	29,740	22,304
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	3,040	3,630
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	758	2,123
Total Liabilities at Fair Value	3,798	5,753
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Cash Equivalents	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 Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	0	0
Total Liabilities at Fair Value	$ 0	$ 0