Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets:
Cash Equivalents	$ 12,805	$ 16,868
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	12,805	16,868
Interest Rate Cash Flow Hedge Asset at Fair Value	0	1,269
Foreign Currency Cash Flow Hedge Asset at Fair Value	361	268
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	284	719
Total Assets at Fair Value	13,450	19,124
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	4,379	5,312
Foreign Currency Cash Flow Hedge Liability at Fair Value	7	103
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	377	355
Total Liabilities at Fair Value	4,763	5,770
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 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	12,805	16,868
Interest Rate Cash Flow Hedge Asset at Fair Value	0	1,269
Foreign Currency Cash Flow Hedge Asset at Fair Value	361	268
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	284	719
Total Assets at Fair Value	13,450	19,124
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	4,379	5,312
Foreign Currency Cash Flow Hedge Liability at Fair Value	7	103
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	377	355
Total Liabilities at Fair Value	4,763	5,770
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 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