Premises and Equipment (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Depreciation and amortization expense $ 5,015 $ 4,919 $ 4,469
Premises and equipment [Member]      
Depreciation and amortization expense 1,949 1,875 1,855
Furniture, fixtures, and equipment [Member]      
Depreciation and amortization expense $ 3,066 $ 3,044 $ 2,614