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Investment Securities - Summary of Held-to-Maturity Securities, Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]    
Fair Value, Less than 12 months $ 57,305 $ 165,656
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,256) (6,365)
Fair Value, 12 months or more 436,938 360,935
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (104,003) (85,401)
Total Fair Value 494,243 526,591
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss (106,259) (91,766)
U.S. Treasury Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Fair Value, Less than 12 months   47,629
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (1,416)
Fair Value, 12 months or more 47,415  
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,848)  
Total Fair Value 47,415 47,629
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss (1,848) (1,416)
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member].    
Schedule of Held-to-maturity Securities [Line Items]    
Fair Value, Less than 12 months 53,423 83,323
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,086) (3,804)
Fair Value, 12 months or more 206,771 182,159
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (46,937) (37,358)
Total Fair Value 260,194 265,482
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss (49,023) (41,162)
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Fair Value, Less than 12 months 3,882 34,704
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (170) (1,145)
Fair Value, 12 months or more 182,752 178,776
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (55,218) (48,043)
Total Fair Value 186,634 213,480
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (55,388) $ (49,188)