Debt Securities Available for Sale - Expected Maturities of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
One year or less	$ 99,641
More than one year to five years	195,370
More than five years to ten years	78,259
Available-for-sale debt securities, allocated and single maturity date, total	373,270
Mortgage-backed securities and collateralized mortgage obligations	1,022,232
Amortized Cost	1,395,502	$ 1,251,230
Fair Value
One year or less	99,662
More than one year to five years	196,775
More than five years to ten years	66,457
Available-for-sale debt securities, allocated and single maturity date, total	362,894
Mortgage-backed securities and collateralized mortgage obligations	909,570
Fair Value	$ 1,272,464	$ 1,093,557

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