Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
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	669,896	$ 680,313
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	540,160	558,359
Amortized Cost
Due in less than one year	4,429
Due after one year through five years	4,200
Due after five years through ten years	8,599
Due after ten years	27,492
Available for sale loans with maturity date, amortized cost, total	44,720
Available for sale, amortized cost, total	2,169,429	2,049,302
Fair Value
Due in less than one year	4,421
Due after one year through five years	4,184
Due after five years through ten years	8,484
Due after ten years	25,901
Available for sale loans with maturity date, fair value, total	42,990
Available for sale, fair value, total	1,949,463	1,836,020
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	580,626
Held to maturity, amortized cost, total	580,626	590,676
Fair Value
Loans without single maturity date	461,865
Held to maturity, fair value, total	461,865	478,930
Amortized Cost
Loans without single maturity date	1,360,816
Available for sale, amortized cost, total	1,360,816	1,152,753
Fair Value
Loans without single maturity date	1,168,818
Available for sale, fair value, total	1,168,818	969,381
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	89,270
Held to maturity, amortized cost, total	89,270	89,637
Fair Value
Loans without single maturity date	78,295
Held to maturity, fair value, total	78,295	79,429
Amortized Cost
Loans without single maturity date	316,950
Available for sale, amortized cost, total	316,950	385,013
Fair Value
Loans without single maturity date	300,555
Available for sale, fair value, total	300,555	368,272
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	136,585
Available for sale, amortized cost, total	136,585	135,878
Fair Value
Loans without single maturity date	126,151
Available for sale, fair value, total	126,151	125,003
Collateralized loan obligations
Amortized Cost
Loans without single maturity date	0
Fair Value
Loans without single maturity date	0
Amortized Cost
Loans without single maturity date	284,677
Available for sale, amortized cost, total	284,677	300,855
Fair Value
Loans without single maturity date	284,627
Available for sale, fair value, total	284,627	299,455
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	25,681
Available for sale, amortized cost, total	25,681	26,599
Fair Value
Loans without single maturity date	26,322
Available for sale, fair value, total	$ 26,322	$ 27,074