Investment Securities - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Less than 12 Months	$ 74,960	$ 63,957
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, 12 Months or Longer		199,479
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	74,960	263,436
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Less than 12 Months	40	196
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, 12 Months or Longer		3,121
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	40	3,317
Treasury notes
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Less than 12 Months		3,052
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, 12 Months or Longer		32,080
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total		35,132
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Less than 12 Months		6
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, 12 Months or Longer		332
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total		338
Federal agencies
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Less than 12 Months	74,960	60,541
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, 12 Months or Longer		167,213
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	74,960	227,754
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Less than 12 Months	40	189
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, 12 Months or Longer		2,787
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	$ 40	2,976
Mortgage-backed - Agency - multi-family
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Less than 12 Months		364
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, 12 Months or Longer		186
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total		550
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Less than 12 Months		1
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, 12 Months or Longer		2
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total		$ 3