Securities Available for Sale and Held to Maturity - Contractual Maturities of Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Securities Available for Sale, Amortized Cost [Abstract]
Due in one year or less	$ 45,777
Due after one year through five years	62,388
Due after five years through ten years	136,553
Total amortized cost, before mortgage-backed securities	244,718
Mortgage-backed securities	1,474,819
Securities Available for Sale, Amortized Cost	1,719,537	$ 1,959,007
Securities Available for Sale, Estimated Fair Value [Abstract]
Due in one year or less	45,976
Due after one year through five years	62,737
Due after five years through ten years	132,763
Total fair value, before mortgage-backed securities	241,476
Mortgage-backed securities	1,451,058
Total	1,692,534	1,762,878
Securities Held to Maturity, Amortized Cost [Abstract]
Due in one year or less	0
Due after one year through five years	29,842
Due after five years through ten years	0
Total amortized cost, before mortgage-backed securities	29,842
Mortgage-backed securities	1,305,543
Securities Held to Maturity, Amortized Cost	1,335,385	1,426,279
Securities Held to Maturity, Estimated Fair Value [Abstract]
Due in one year or less	0
Due after one year through five years	29,321
Due after five years through ten years	0
Total fair value, before mortgage-backed securities	29,321
Mortgage-backed securities	1,229,786
Total	$ 1,259,107	$ 1,355,504