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Investment Securities - Unrealized Losses on Investment Securities Available for Sale (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months $ 41,900 $ 46,696
12 Months or Longer 701,099 902,899
Fair Value 742,999 949,595
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (327) (288)
12 Months or Longer (91,467) (95,932)
Unrealized Losses (91,794) (96,220)
U.S. government and agency securities    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 0 0
12 Months or Longer 12,474 13,750
Fair Value 12,474 13,750
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months 0 0
12 Months or Longer (2,471) (2,297)
Unrealized Losses (2,471) (2,297)
Municipal securities    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 3,125 3,548
12 Months or Longer 62,284 71,458
Fair Value 65,409 75,006
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (80) (18)
12 Months or Longer (12,515) (12,697)
Unrealized Losses (12,595) (12,715)
Residential CMO and MBS(1)    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 26,652 0
12 Months or Longer 269,370 358,316
Fair Value 296,022 358,316
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (32) 0
12 Months or Longer (43,578) (46,125)
Unrealized Losses (43,610) (46,125)
Commercial CMO and MBS(1)    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 5,702 37,899
12 Months or Longer 352,855 448,197
Fair Value 358,557 486,096
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (60) (228)
12 Months or Longer (32,750) (34,512)
Unrealized Losses (32,810) (34,740)
Corporate obligations    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 4,699 911
12 Months or Longer 3,848 3,887
Fair Value 8,547 4,798
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (145) (20)
12 Months or Longer (152) (114)
Unrealized Losses (297) (134)
Other asset-backed securities    
Investment Securities, Available for Sale, Fair Value    
Less than 12 Months 1,722 4,338
12 Months or Longer 268 7,291
Fair Value 1,990 11,629
Investment Securities, Available-for-Sale, Unrealized Loss    
Less than 12 Months (10) (22)
12 Months or Longer (1) (187)
Unrealized Losses $ (11) $ (209)