Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financial Assets
Derivatives	$ 184
Financial Liabilities
Derivatives		(353)
Recurring [Member]
Financial Assets
Escrow account	898	898
Deferred compensation plan assets	5,531	5,280
Derivatives	184
Total Assets	6,613	6,178
Financial Liabilities
Derivatives		(353)
Recurring [Member] \| Level 1 [Member]
Financial Assets
Escrow account	898	898
Deferred compensation plan assets	5,531	5,280
Derivatives
Total Assets	6,429	6,178
Financial Liabilities
Derivatives
Recurring [Member] \| Level 2 [Member]
Financial Assets
Escrow account
Deferred compensation plan assets
Derivatives	184
Total Assets	184
Financial Liabilities
Derivatives		(353)
Recurring [Member] \| Level 3 [Member]
Financial Assets
Escrow account
Deferred compensation plan assets
Derivatives
Total Assets
Financial Liabilities
Derivatives

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

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-Paragraph 2

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

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

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Other long-term assets not otherwise listed in the existing taxonomy that are pledged or subject to withdrawal restrictions.

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