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Accumulated Other Comprehensive Income (Loss) ("AOCIL"), Summary of Changes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Changes in AOCIL [Roll Forward]    
Balance at beginning of period $ 389,522 $ 350,169
Other comprehensive loss before reclassifications (6,805) (927)
Amounts reclassified from AOCIL 1,119 (141)
Other comprehensive loss (5,686) (1,068)
Balances at end of period 387,329 335,618
Accumulated Other Comprehensive Loss [Member]    
Changes in AOCIL [Roll Forward]    
Balance at beginning of period 10,024 (3,786)
Other comprehensive loss (5,686) (1,068)
Balances at end of period 4,338 (4,854)
Unrealized Gains on Securities Available For Sale [Member]    
Changes in AOCIL [Roll Forward]    
Balance at beginning of period 15,822 3,739
Other comprehensive loss before reclassifications (6,805) (606)
Amounts reclassified from AOCIL 1,119 (200)
Other comprehensive loss (5,686) (806)
Balances at end of period 10,136 2,933
Disproportionate Tax Effects from Securities Available for Sale [Member]    
Changes in AOCIL [Roll Forward]    
Balance at beginning of period (5,798) (5,798)
Other comprehensive loss before reclassifications 0 0
Amounts reclassified from AOCIL 0 0
Other comprehensive loss 0 0
Balances at end of period (5,798) (5,798)
Unrealized Losses on Cash Flow Hedges [Member]    
Changes in AOCIL [Roll Forward]    
Balance at beginning of period 0 (1,727)
Other comprehensive loss before reclassifications 0 (321)
Amounts reclassified from AOCIL 0 59
Other comprehensive loss 0 (262)
Balances at end of period $ 0 $ (1,989)