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Financial instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Loans outstanding	$ 422,259,000us-gaap_LongTermDebt	$ 657,259,000us-gaap_LongTermDebt
Executive Director or Officer [Member]
Derivatives, Fair Value [Line Items]
Loans outstanding	$ 0

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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