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Investment Securities Available-for-Sale by Security Type (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost $ 320,598 $ 272,595
Gross unrealized gains 2,847 3,036
Gross unrealized losses (2,731) (2,841)
Available for sale securities, at fair value 320,714 272,790
U.S. government agencies and corporations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost 2,551 12,626
Gross unrealized gains 141 204
Gross unrealized losses 0 (10)
Available for sale securities, at fair value 2,692 12,820
State and political subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost 71,431 51,234
Gross unrealized gains 1,669 1,286
Gross unrealized losses (21) (161)
Available for sale securities, at fair value 73,079 52,359
Collateralized mortgage obligations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost [1] 133,414 126,430
Gross unrealized gains [1] 491 856
Gross unrealized losses [1] (1,290) (1,416)
Available for sale securities, at fair value [1] 132,615 125,870
Mortgage-backed securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost [1] 101,299 65,813
Gross unrealized gains [1] 485 624
Gross unrealized losses [1] (696) (284)
Available for sale securities, at fair value [1] 101,088 66,153
Trust preferred securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost 1,773 1,763
Gross unrealized gains 0 0
Gross unrealized losses (668) (845)
Available for sale securities, at fair value 1,105 918
Corporate notes and equity securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, amortized cost 10,130 14,729
Gross unrealized gains 61 66
Gross unrealized losses (56) (125)
Available for sale securities, at fair value $ 10,135 $ 14,670
[1] All collateralized mortgage obligations and mortgage-backed securities consist of residential mortgage pass-through securities guaranteed by GNMA or issued by FNMA and real estate mortgage investment conduits guaranteed by FHLMC or GNMA.