Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
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	774,706	$ 638,640
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	645,439	627,398
Amortized Cost
Due in less than one year	1,546
Due after one year through five years	15,959
Due after five years through ten years	3,788
Due after ten years	14,272
Available for sale loans with maturity date, amortized cost, total	35,565
Available for sale, amortized cost, total	2,107,137	1,653,658
Fair Value
Due in less than one year	1,544
Due after one year through five years	15,817
Due after five years through ten years	3,645
Due after ten years	12,121
Available for sale loans with maturity date, fair value, total	33,127
Available for sale, fair value, total	1,860,734	1,644,319
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	774,706
Held to maturity, amortized cost, total		638,640
Fair Value
Loans without single maturity date	645,439
Held to maturity, fair value, total		627,398
Amortized Cost
Loans without single maturity date	1,573,618
Available for sale, amortized cost, total	1,573,618	1,234,721
Fair Value
Loans without single maturity date	1,353,569
Available for sale, fair value, total	1,353,569	1,222,720
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	183,740
Available for sale, amortized cost, total	183,740	88,096
Fair Value
Loans without single maturity date	171,964
Available for sale, fair value, total	171,964	88,767
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	314,214
Available for sale, amortized cost, total	314,214	292,751
Fair Value
Loans without single maturity date	302,074
Available for sale, fair value, total	$ 302,074	$ 292,690