Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets:
Cash Equivalents	$ 10,787	$ 16,868
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	10,787	16,868
Interest Rate Fair Value Hedge Asset at Fair Value	565	1,269
Foreign Currency Cash Flow Hedge Asset at Fair Value	469	268
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	235	719
Total Assets at Fair Value	12,056	19,124
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	4,668	5,312
Foreign Currency Cash Flow Hedge Liability at Fair Value	3	103
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	775	355
Total Liabilities at Fair Value	5,446	5,770
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	0	0
Interest Rate Fair Value 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	10,787	16,868
Interest Rate Fair Value Hedge Asset at Fair Value	565	1,269
Foreign Currency Cash Flow Hedge Asset at Fair Value	469	268
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	235	719
Total Assets at Fair Value	12,056	19,124
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	4,668	5,312
Foreign Currency Cash Flow Hedge Liability at Fair Value	3	103
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	775	355
Total Liabilities at Fair Value	5,446	5,770
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Cash Equivalents	0	0
Interest Rate Fair Value 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