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Investment Securities - Summary of Held-to-Maturity Securities, Unrealized Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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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)

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