Borrowings - Summary of Borrowings By Type (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Borrowings [Line Items]
Balance at end of period	$ 17,681	$ 18,680
Federal Home Loan Bank Advances [Member]
Schedule of Borrowings [Line Items]
Balance at end of period	$ 200,000	$ 140,000
Weighted average interest rate	1.44%	2.04%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Borrowings [Line Items]
Balance at end of period	$ 5,010	$ 10,098
Weighted average interest rate	0.57%	2.07%
Subordinated Debt [Member]
Schedule of Borrowings [Line Items]
Balance at end of period	$ 193,413	$ 94,818
Weighted average interest rate	4.90%	5.32%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Borrowings [Line Items]
Balance at end of period	$ 17,681	$ 18,680
Weighted average interest rate	0.05%	0.05%