Investment Securities - Available-for-Sale Unrealized Loss and Held-to-Maturity Total Unrealized Loss Position Summary (Details) $ in Thousands	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Investment Securities
Total Less Than 12 Months Unrealized Fair Value		$ 10,326
Total Less Than 12 Months Unrealized Losses		(107)
Total 12 Months or Longer Unrealized Fair Value	$ 563,571	574,685
Total 12 Months or Longer Unrealized Losses	$ (133,256)	$ (119,953)
Total Number of Securities | security	156	156
Total Fair value	$ 563,571	$ 585,011
Total Unrealized losses	$ (133,256)	$ (120,060)