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Investment Securities (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost, Due in less than one year $ 11,263  
Amortized cost, Due after one year but within five years 191,976  
Amortized cost, Due after five years but within ten years 88,867  
Amortized cost, Due after ten years 57,343  
Available-for-sale Securities, Amortized Cost Basis, Total 350,029 $ 346,078
Amortized cost, Total 350,029  
Estimated fair value, Due in less than one year 11,298  
Estimated fair value, Due after one year but within five years 192,345  
Estimated fair value, Due after five years but within ten years 90,216  
Estimated fair value, Due after ten years 58,093  
Available-for-sale Securities, Total 353,438 348,931
Securities available-for-sale, at fair value 353,438 348,931
Common Stock [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis, Total 580 588
Available-for-sale Securities, Total 1,486 1,283
Securities available-for-sale, at fair value $ 1,486 $ 1,283