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Investment Securities - Unrealized Losses (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair Value    
Less than 12 Months $ 198,278 $ 21,668
12 Months or Longer 30,469 37,362
Total 228,747 59,030
Unrealized Losses    
Less than 12 Months (7,126) (256)
12 Months or Longer (319) (297)
Total (7,445) (553)
U.S. government and agency securities    
Fair Value    
Less than 12 Months 54,549  
12 Months or Longer 0  
Total 54,549  
Unrealized Losses    
Less than 12 Months (2,188)  
12 Months or Longer 0  
Total (2,188)  
Municipal securities    
Fair Value    
Less than 12 Months 48,130 10,264
12 Months or Longer 2,312 0
Total 50,442 10,264
Unrealized Losses    
Less than 12 Months (1,558) (227)
12 Months or Longer (153) 0
Total (1,711) (227)
Residential CMO and MBS    
Fair Value    
Less than 12 Months 16,359 0
12 Months or Longer 24,221 25,293
Total 40,580 25,293
Unrealized Losses    
Less than 12 Months (768) 0
12 Months or Longer (149) (209)
Total (917) (209)
Commercial CMO and MBS    
Fair Value    
Less than 12 Months 79,240 11,404
12 Months or Longer 2,606 7,499
Total 81,846 18,903
Unrealized Losses    
Less than 12 Months (2,612) (29)
12 Months or Longer (7) (61)
Total (2,619) (90)
Other asset-backed securities    
Fair Value    
Less than 12 Months 0 0
12 Months or Longer 1,330 4,570
Total 1,330 4,570
Unrealized Losses    
Less than 12 Months 0 0
12 Months or Longer (10) (27)
Total $ (10) $ (27)