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Long-Term Debt (Details) (USD $)
Mar. 31, 2015
Mar. 07, 2014
Debt Instrument [Line Items]    
Line of credit facility, remaining borrowing capacity $ 171,100,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity  
Line of credit facility, maximum borrowing capacity   300,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Letters of credit and bank guarantees outstanding, amount 6,000,000us-gaap_LettersOfCreditOutstandingAmount  
Debt instrument, collateral amount 2,700,000us-gaap_DebtInstrumentCollateralAmount  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Letters of credit and bank guarantees outstanding, amount $ 2,900,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember