Investment Securities, Contractual Maturity (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Amortized Cost [Abstract]
One year or less	$ 424
After one year through five years	20,439
After five years through ten years	5,402
After ten years	233,053
Total	259,318
Fair Value [Abstract]
One year or less	423
After one year through five years	20,242
After five years through ten years	5,228
After ten years	213,963
Total	239,856
Amortized Cost [Abstract]
One year or less	2,230
After one year through five years	18,087
After five years through ten years	21,009
After ten years	765,645
Total	806,971
Fair Value [Abstract]
One year or less	2,230
After one year through five years	17,787
After five years through ten years	19,842
After ten years	609,916
Total	$ 649,775