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Securities Continuous Unrealized Loss (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 0 $ 31,889
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses 0 447
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 123,855 157,875
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses 1,253 5,183
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 123,855 189,764
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses 1,253 5,630
US Government and Government Agencies and Authorities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 4,724
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses 0 28
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 35,676 44,307
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses 217 1,172
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 35,676 49,031
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses 217 1,200
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 12,325
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses 0 238
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 79,546 99,184
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses 968 3,500
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 79,546 111,509
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses 968 3,738
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 14,840
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses 0 181
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 8,633 14,384
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses 68 511
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 8,633 29,224
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses $ 68 $ 692