Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
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	680,313	$ 747,408
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	558,359	617,741
Amortized Cost
Due in less than one year	4,537
Due after one year through five years	6,066
Due after five years through ten years	9,465
Due after ten years	28,136
Available for sale loans with maturity date, amortized cost, total	48,204
Available for sale, amortized cost, total	2,049,302	2,119,303
Fair Value
Due in less than one year	4,504
Due after one year through five years	6,069
Due after five years through ten years	9,362
Due after ten years	26,900
Available for sale loans with maturity date, fair value, total	46,835
Securities available-for-sale (at fair value)	1,836,020	1,871,742
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	590,676
Held to maturity, amortized cost, total	590,676	634,300
Fair Value
Loans without single maturity date	478,930
Held to maturity, fair value	478,930	517,653
Amortized Cost
Loans without single maturity date	1,152,753
Available for sale, amortized cost, total	1,152,753	1,170,062
Fair Value
Loans without single maturity date	969,381
Securities available-for-sale (at fair value)	969,381	974,329
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	89,637
Held to maturity, amortized cost, total	89,637	113,108
Fair Value
Loans without single maturity date	79,429
Held to maturity, fair value	79,429	100,088
Amortized Cost
Loans without single maturity date	385,013
Available for sale, amortized cost, total	385,013	391,135
Fair Value
Loans without single maturity date	368,272
Securities available-for-sale (at fair value)	368,272	364,324
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	135,878
Available for sale, amortized cost, total	135,878	179,148
Fair Value
Loans without single maturity date	125,003
Securities available-for-sale (at fair value)	125,003	166,387
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	300,855
Available for sale, amortized cost, total	300,855	313,155
Fair Value
Loans without single maturity date	299,455
Securities available-for-sale (at fair value)	299,455	302,904
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	26,599
Available for sale, amortized cost, total	26,599	22,640
Fair Value
Loans without single maturity date	27,074
Securities available-for-sale (at fair value)	$ 27,074	$ 22,410