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Indebtedness (Details Textual) In Thousands, unless otherwise specified	1 Months Ended	6 Months Ended	12 Months Ended
	Jan. 31, 2011 USD ($)	Jun. 30, 2012 USD ($) Contract	Dec. 31, 2011 EUR (€)	Jul. 03, 2011 USD ($)	Mar. 31, 2011	Jun. 30, 2012 Interest Rate Swap [Member] USD ($)	Mar. 31, 2011 Term Loan [Member] USD ($)	Jan. 10, 2011 Secured Debt [Member] USD ($)	Jun. 30, 2012 Revolving Credit Facility [Member] USD ($)	Jun. 30, 2012 Initial Term Commitment [Member] USD ($)
Indebtedness (Textual) [Abstract]
Senior secured credit facility with a syndicate of banks led by Bank of the West								$ 137,000	$ 75,000	$ 62,000
Revolving line of credit and the term loan mature date		Jan. 10, 2016
Line of credit facility outstanding		135,000
Extinguishment of term loan	546
Fixed interest rate swap with an amortizing notional covering					75.00%
Term loan debt							45,000
Termination date for interest rate swap		Dec. 14, 2014
Number of Interest rate swap contract outstanding		1
Increase borrowings under credit facility agreement		75,000
Notional amount of interest rate swap						42,375
Amounts in other comprehensive income expected to be reclassified		(671)
Duration of other comprehensive income expected to be reclassified to earnings		12 months
Derivative euro exchange forward contract			4,500
Notional amount of interest rate swap percentage		84.75%
Senior Credit Facility Agreement In Foreign Subsidiaries in an Aggregate Amount				$ 2,000

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Derivative euro exchange forward contract.

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Senior credit facility agreement in foreign subsidiaries in an aggregate amount .

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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The percentage of expected requirements covered by the aggregate notional amount of derivative contracts expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract as a percentage of expected need.

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Gross amount of debt extinguished.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

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