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Securities Available-for-Sale (Details) - Schedule of unrealized losses not recognized in income - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Investment Securities:    
Investment Securities: Total, Fair Value $ 323,760 $ 278,357
Investment Securities: Total, Unrealized Losses (8,132) (4,470)
Investment Securities: Less than 12 Months, Fair Value 225,449 168,028
Investment Securities: Less than 12 Months, Unrealized Losses (3,755) (1,631)
Investment Securities: 12 Months or Longer, Fair Value 98,311 110,329
Investment Securities: 12 Months or Longer, Unrealized Losses (4,377) (2,839)
Federal Agency Obligations [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 47,303 39,813
Investment Securities: Total, Unrealized Losses (876) (416)
Investment Securities: Less than 12 Months, Fair Value 35,987 28,407
Investment Securities: Less than 12 Months, Unrealized Losses (538) (213)
Investment Securities: 12 Months or Longer, Fair Value 11,316 11,406
Investment Securities: 12 Months or Longer, Unrealized Losses (338) (203)
Residential mortgage pass-through securities [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 179,661 148,574
Investment Securities: Total, Unrealized Losses (3,960) (1,948)
Investment Securities: Less than 12 Months, Fair Value 142,446 117,556
Investment Securities: Less than 12 Months, Unrealized Losses (2,428) (1,146)
Investment Securities: 12 Months or Longer, Fair Value 37,215 31,018
Investment Securities: 12 Months or Longer, Unrealized Losses (1,532) (802)
Commercial mortgage pass-through securities [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 3,959 1,198
Investment Securities: Total, Unrealized Losses (61) (3)
Investment Securities: Less than 12 Months, Fair Value 3,959 1,198
Investment Securities: Less than 12 Months, Unrealized Losses (61) (3)
Investment Securities: 12 Months or Longer, Fair Value
Investment Securities: 12 Months or Longer, Unrealized Losses
Obligation Of Us States And Political Subdivisions [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 68,741 57,685
Investment Securities: Total, Unrealized Losses (2,738) (1,334)
Investment Securities: Less than 12 Months, Fair Value 31,497 17,909
Investment Securities: Less than 12 Months, Unrealized Losses (630) (246)
Investment Securities: 12 Months or Longer, Fair Value 37,244 39,776
Investment Securities: 12 Months or Longer, Unrealized Losses (2,108) (1,088)
Trust Preferred Securities [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 1,496 1,469
Investment Securities: Total, Unrealized Losses (83) (111)
Investment Securities: Less than 12 Months, Fair Value
Investment Securities: Less than 12 Months, Unrealized Losses
Investment Securities: 12 Months or Longer, Fair Value 1,496 1,469
Investment Securities: 12 Months or Longer, Unrealized Losses (83) (111)
Corporate Bonds And Notes [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 19,693 11,074
Investment Securities: Total, Unrealized Losses (392) (271)
Investment Securities: Less than 12 Months, Fair Value 10,637 1,965
Investment Securities: Less than 12 Months, Unrealized Losses (87) (21)
Investment Securities: 12 Months or Longer, Fair Value 9,056 9,109
Investment Securities: 12 Months or Longer, Unrealized Losses (305) (250)
Asset-backed Securities [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value 2,907 7,428
Investment Securities: Total, Unrealized Losses (22) (37)
Investment Securities: Less than 12 Months, Fair Value 923 993
Investment Securities: Less than 12 Months, Unrealized Losses (11) (2)
Investment Securities: 12 Months or Longer, Fair Value 1,984 6,435
Investment Securities: 12 Months or Longer, Unrealized Losses $ (11) (35)
Equity Securities [Member]    
Investment Securities:    
Investment Securities: Total, Fair Value   11,116
Investment Securities: Total, Unrealized Losses   (350)
Investment Securities: Less than 12 Months, Fair Value  
Investment Securities: Less than 12 Months, Unrealized Losses  
Investment Securities: 12 Months or Longer, Fair Value   11,116
Investment Securities: 12 Months or Longer, Unrealized Losses   $ (350)