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Borrowings Contractual maturities of the Company's long-term debt (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Debt Disclosure [Abstract]  
Due in 2015 $ 50,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Due in 2016 5,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Total $ 55,000us-gaap_LongTermDebt