Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	$ 555,070	$ 82,266
Unrealized Losses, AFS and HTM	2,348	301
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	7,003	52,700
Unrealized Losses, AFS and HTM	332	470
Total
Fair Value, AFS and HTM	562,073	134,966
Unrealized Losses, AFS and HTM	2,680	771
Government-sponsored enterprise securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	29,812	4,992
Unrealized Losses, AFS	181	8
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	0	0
Unrealized Losses, AFS	0	0
Total
Fair Value, AFS	29,812	4,992
Unrealized Losses, AFS	181	8
Mortgage-backed securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	497,992	77,274
Unrealized Losses, AFS and HTM	1,957	293
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	6,168	50,851
Unrealized Losses, AFS and HTM	167	382
Total
Fair Value, AFS and HTM	504,160	128,125
Unrealized Losses, AFS and HTM	2,124	675
Corporate bonds
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	3,956	0
Unrealized Losses, AFS	45	0
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	835	915
Unrealized Losses, AFS	165	85
Total
Fair Value, AFS	4,791	915
Unrealized Losses, AFS	210	85
State and local governments
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, HTM	23,310	0
Unrealized Losses, HTM	165	0
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, HTM	0	934
Unrealized Losses, HTM	0	3
Total
Fair Value, HTM	23,310	934
Unrealized Losses, HTM	$ 165	$ 3