Commitments and Contingencies (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Legal Proceedings [Line Items]
Unconditionally cancellable commitments to extend credit	$ 728,721	$ 739,860
Litigation Settlement, Amount Awarded to Other Party	1,200
Loss Contingency Accrual	0	0
Off-Balance Sheet, Credit Loss, Liability	2,600	21
Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	$ (797)	$ (1)	$ 2