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Loans and Allowance for Loan Losses (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Categories of impaired loans    
Non-accrual loans $ 11,730 $ 18,243
Troubled debt restructurings continuing to accrue interest 6,095 17,720
Total impaired loans $ 17,825 $ 35,963