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Securities - Schedule of Amortized Cost and Fair Value of Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Securities available for sale:    
Amortized Cost $ 270,839 $ 346,733
Unrealized Gains 3,648 3,899
Unrealized Losses 2,282 4,130
Securities available for sale 272,205 346,502 [1]
Federal agencies and GSEs    
Securities available for sale:    
Amortized Cost 88,413 106,379
Unrealized Gains 21 62
Unrealized Losses 1,511 2,387
Securities available for sale 86,923 104,054
Mortgage-backed and CMOs    
Securities available for sale:    
Amortized Cost 80,026 79,917
Unrealized Gains 412 514
Unrealized Losses 542 938
Securities available for sale 79,896 79,493
State and municipal    
Securities available for sale:    
Amortized Cost 93,012 145,757
Unrealized Gains 1,996 2,540
Unrealized Losses 225 782
Securities available for sale 94,783 147,515
Corporate    
Securities available for sale:    
Amortized Cost 8,100 13,392
Unrealized Gains 248 123
Unrealized Losses 4 23
Securities available for sale 8,344 13,492
Equity securities    
Securities available for sale:    
Amortized Cost 1,288 1,288
Unrealized Gains 971 660
Unrealized Losses 0 0
Securities available for sale $ 2,259 $ 1,948
[1] Derived from audited consolidated financial statements.