Securities Available for Sale and Held to Maturity - Contractual Maturities of Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Securities Available for Sale, Amortized Cost [Abstract]
Due in one year or less	$ 32,876
Due after one year through five years	62,454
Due after five years through ten years	165,872
Total amortized cost, before mortgage-backed securities	261,202
Mortgage-backed securities	1,470,664
Securities Available for Sale, Amortized Cost	1,731,866	$ 1,719,537
Securities Available for Sale, Estimated Fair Value [Abstract]
Due in one year or less	32,994
Due after one year through five years	63,109
Due after five years through ten years	165,685
Total fair value, before mortgage-backed securities	261,788
Mortgage-backed securities	1,475,674
Total	1,737,462	1,692,534
Securities Held to Maturity, Amortized Cost [Abstract]
Due in one year or less	0
Due after one year through five years	30,033
Due after five years through ten years	0
Total amortized cost, before mortgage-backed securities	30,033
Mortgage-backed securities	1,285,020
Securities Held to Maturity, Amortized Cost	1,315,053	1,335,385
Securities Held to Maturity, Estimated Fair Value [Abstract]
Due in one year or less	0
Due after one year through five years	29,913
Due after five years through ten years	0
Total fair value, before mortgage-backed securities	29,913
Mortgage-backed securities	1,229,985
Total	$ 1,259,898	$ 1,259,107