Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Amortized Cost
Due in less than one year	$ 0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	0
Held to maturity loans with maturity date, amortized cost, total	0
Held to maturity, amortized cost, total	598,604	$ 635,186
Fair Value
Due in less than one year	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	0
Held to maturity loans with maturity date, fair value, total	0
Held to maturity, fair value, total	498,384	507,594
Amortized Cost
Due in less than one year	14,004
Due after one year through five years	11,272
Due after five years through ten years	8,321
Due after ten years	16,243
Available for sale loans with maturity date, amortized cost, total	49,840
Available for sale, amortized cost, total	3,332,322	2,434,389
Fair Value
Due in less than one year	14,010
Due after one year through five years	11,262
Due after five years through ten years	8,598
Due after ten years	14,743
Available for sale loans with maturity date, fair value, total	48,613
Available for sale, fair value, total	3,212,080	2,226,543
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	511,031
Held to maturity, amortized cost, total	511,031	546,444
Fair Value
Loans without single maturity date	417,312
Held to maturity, fair value, total	417,312	428,824
Amortized Cost
Loans without single maturity date	2,654,711
Available for sale, amortized cost, total	2,654,711	1,777,274
Fair Value
Loans without single maturity date	2,542,458
Available for sale, fair value, total	2,542,458	1,587,975
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	87,573
Held to maturity, amortized cost, total	87,573	88,742
Fair Value
Loans without single maturity date	81,072
Held to maturity, fair value, total	81,072	78,770
Amortized Cost
Loans without single maturity date	299,739
Available for sale, amortized cost, total	299,739	206,537
Fair Value
Loans without single maturity date	297,746
Available for sale, fair value, total	297,746	197,449
Private mortgage-backed securities and collateralized mortgage obligations
Amortized Cost
Loans without single maturity date	0
Fair Value
Loans without single maturity date	0
Amortized Cost
Loans without single maturity date	103,825
Available for sale, amortized cost, total	103,825	129,475
Fair Value
Loans without single maturity date	98,591
Available for sale, fair value, total	98,591	121,242
CLOs
Amortized Cost
Loans without single maturity date	0
Fair Value
Loans without single maturity date	0
Amortized Cost
Loans without single maturity date	216,818
Available for sale, amortized cost, total	216,818	278,342
Fair Value
Loans without single maturity date	217,207
Available for sale, fair value, total	217,207	278,964
Other debt securities
Amortized Cost
Loans without single maturity date	0
Fair Value
Loans without single maturity date	0
Amortized Cost
Loans without single maturity date	7,389
Available for sale, amortized cost, total	7,389	7,389
Fair Value
Loans without single maturity date	7,465
Available for sale, fair value, total	$ 7,465	$ 7,483