Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value Measurements
Derivative assets	$ 2,411	$ 2,155
Derivative liabilities	(1,028)	(861)
Carrying Amount
Fair Value Measurements
Derivative assets	2,411	2,155
Derivative liabilities	(1,028)	(861)
Acquisition earn-out liability	(693)	(670)
Carrying Amount \| Short-term debt
Fair Value Measurements
Debt		(833)
Carrying Amount \| Long-term debt
Fair Value Measurements
Debt	(79,761)	(70,448)
Fair Value \| Significant Observable Inputs (Level 2) \| Short-term debt
Fair Value Measurements
Debt		(833)
Fair Value \| Significant Observable Inputs (Level 2) \| Long-term debt
Fair Value Measurements
Debt	(79,761)	(70,448)
Fair Value \| Recurring \| Significant Observable Inputs (Level 2)
Fair Value Measurements
Derivative assets	2,411	2,155
Derivative liabilities	(1,028)	(861)
Acquisition earn-out liability	$ (693)	$ (670)

Amount of liability recognized arising from contingent consideration in a business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

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

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-Name Accounting Standards Codification

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

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Fair value, before 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 liabilities not subject to a master netting arrangement and elected not to be offset.

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