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Investment Securities - Schedule of Investment in AFS Securities and HTM Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Amortized Cost
Total investment securities available-for-sale	$ 984,607
Estimated Fair Value
Less: allowance for credit losses	0	$ 0
Total investment securities available-for-sale	904,183
Held to maturity, allowance for credit loss	454	1,030
Amortized Cost
Less: allowance for credit losses	(454)	(1,030)
Total investment securities held-to-maturity	814,878	854,780
Estimated Fair Value
Total investment securities held-to-maturity	730,994	774,947
Asset-Backed Securities
Amortized Cost
Within one year	70,524
One to five years	235,827
Five to ten years	17,450
Beyond ten years	17,897
Estimated Fair Value
Within one year	69,832
One to five years	221,497
Five to ten years	16,523
Beyond ten years	15,849
Held to maturity, allowance for credit loss	454
Amortized Cost
Within one year	11,972
One to five years	70,858
Five to ten years	80,146
Beyond ten years	50,877
Less: allowance for credit losses	(454)
Total investment securities held-to-maturity	814,878
Total	1,799,485
Estimated Fair Value
Within one year	11,906
One to five years	68,659
Five to ten years	75,368
Beyond ten years	46,722
Total investment securities held-to-maturity	730,994
Total	1,635,177
Residential mortgage-backed securities
Amortized Cost
Amortized cost, without maturity	574,550
Estimated Fair Value
Estimated fair value, without maturity	514,748
Amortized Cost
Amortized cost, without maturity	516,797
Estimated Fair Value
Estimated fair value, without maturity	454,066
Total investment securities held-to-maturity	454,066	485,566
Commercial mortgage-backed securities
Amortized Cost
Amortized cost, without maturity	68,359
Estimated Fair Value
Estimated fair value, without maturity	65,734
Amortized Cost
Amortized cost, without maturity	84,682
Estimated Fair Value
Estimated fair value, without maturity	74,273
Total investment securities held-to-maturity	$ 74,273	$ 75,973

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