Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets:
Cash Equivalents	$ 14,466	$ 13,636
Fair Value, Measurements, Recurring [Member]
Assets:
Cash Equivalents	14,466	13,636
Interest Rate Cash Flow Hedge Asset at Fair Value	916	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	141	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	463	448
Total Assets at Fair Value	15,986	14,084
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	6,493	8,172
Foreign Currency Cash Flow Hedge Liability at Fair Value	868	421
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	1,097	280
Total Liabilities at Fair Value	8,458	8,873
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	14,466	13,636
Interest Rate Cash Flow Hedge Asset at Fair Value	916	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	141	0
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value	463	448
Total Assets at Fair Value	15,986	14,084
Liabilities:
Interest Rate Cash Flow Hedge Liability at Fair Value	6,493	8,172
Foreign Currency Cash Flow Hedge Liability at Fair Value	868	421
Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value	1,097	280
Total Liabilities at Fair Value	8,458	8,873
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

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

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Fair value of financial and nonfinancial obligations.

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