Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 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	646,050	$ 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	538,485	558,359
Amortized Cost
Due in less than one year	999
Due after one year through five years	6,163
Due after five years through ten years	8,373
Due after ten years	22,144
Available for sale loans with maturity date, amortized cost, total	37,679
Available for sale, amortized cost, total	2,325,199	2,049,302
Fair Value
Due in less than one year	999
Due after one year through five years	6,187
Due after five years through ten years	8,413
Due after ten years	20,913
Available for sale loans with maturity date, fair value, total	36,512
Available for sale, fair value, total	2,160,055	1,836,020
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	557,119
Held to maturity, amortized cost, total	557,119	590,676
Fair Value
Loans without single maturity date	457,397
Held to maturity, fair value, total	457,397	478,930
Amortized Cost
Loans without single maturity date	1,558,076
Available for sale, amortized cost, total	1,558,076	1,152,753
Fair Value
Loans without single maturity date	1,408,009
Available for sale, fair value, total	1,408,009	969,381
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	88,931
Held to maturity, amortized cost, total	88,931	89,637
Fair Value
Loans without single maturity date	81,088
Held to maturity, fair value, total	81,088	79,429
Amortized Cost
Loans without single maturity date	299,975
Available for sale, amortized cost, total	299,975	385,013
Fair Value
Loans without single maturity date	292,249
Available for sale, fair value, total	292,249	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	136,038
Available for sale, amortized cost, total	136,038	135,878
Fair Value
Loans without single maturity date	129,298
Available for sale, fair value, total	129,298	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	286,042
Available for sale, amortized cost, total	286,042	300,855
Fair Value
Loans without single maturity date	286,532
Available for sale, fair value, total	286,532	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	7,389
Available for sale, amortized cost, total	7,389	26,599
Fair Value
Loans without single maturity date	7,455
Available for sale, fair value, total	$ 7,455	$ 27,074