Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 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	794,785	$ 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	706,170	627,398
Amortized Cost
Due in less than one year	2,768
Due after one year through five years	14,400
Due after five years through ten years	5,679
Due after ten years	14,348
Available for sale loans with maturity date, amortized cost, total	37,195
Available for sale, amortized cost, total	1,963,204	1,653,658
Fair Value
Due in less than one year	2,770
Due after one year through five years	14,600
Due after five years through ten years	5,598
Due after ten years	12,971
Available for sale loans with maturity date, fair value, total	35,939
Available for sale, fair value, total	1,800,791	1,644,319
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Loans without single maturity date	794,785
Held to maturity, amortized cost, total		638,640
Fair Value
Loans without single maturity date	706,170
Held to maturity, fair value, total		627,398
Amortized Cost
Loans without single maturity date	1,444,668
Available for sale, amortized cost, total	1,444,668	1,234,721
Fair Value
Loans without single maturity date	1,301,812
Available for sale, fair value, total	1,301,812	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	166,176
Available for sale, amortized cost, total	166,176	88,096
Fair Value
Loans without single maturity date	158,849
Available for sale, fair value, total	158,849	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	315,165
Available for sale, amortized cost, total	315,165	292,751
Fair Value
Loans without single maturity date	304,191
Available for sale, fair value, total	$ 304,191	$ 292,690