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Employee Benefits (Information on Employee Stock Ownership Plan Shares) (Details)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Employee Benefits [Abstract]      
Allocated shares 426,877us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares 414,896us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares 397,176us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares
Suspense shares 0us-gaap_EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares 0us-gaap_EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares 31,785us-gaap_EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares
Committed-to-be released shares   31,785us-gaap_EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares 31,783us-gaap_EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares