Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Amortized cost
Due in one year or less	$ 305	$ 849
Due in one to five years	5,267	4,186
Due in five to ten years	247,933	225,954
Due in over ten years	521,904	504,560
Amortized cost, sub-total	775,409	735,549
Amortized cost, AFS debt securities	1,708,893	1,679,397
Fair Value
Due in one year or less	304	847
Due in one to five years	5,207	4,600
Due in five to ten years	245,040	222,943
Due in over ten years	498,785	483,762
Fair value, sub-total	749,336	712,152
Total AFS debt securities	1,580,720	1,538,008
Mortgage-backed securities - residential
Amortized cost
Mortgage-backed securities	917,760	927,883
Amortized cost, AFS debt securities	917,760	927,883
Fair Value
Mortgage-backed securities	816,556	810,999
Total AFS debt securities	816,556	810,999
Mortgage-backed securities - commercial
Amortized cost
Mortgage-backed securities	15,724	15,965
Amortized cost, AFS debt securities	15,724	15,965
Fair Value
Mortgage-backed securities	14,828	14,857
Total AFS debt securities	$ 14,828	$ 14,857