Short-Term Borrowings and Long-Term FHLB Advances - Information Concerning Short-term Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Long-term Federal Home Loan Bank Advances [Abstract]
Balance at period-end	$ 21,553	$ 28,891	$ 21,553	$ 28,891	$ 72,161
Maximum amount outstanding at any month end	22,559	174,431	60,027	174,431
Average balance outstanding during the period	$ 19,935	$ 136,816	$ 25,944	$ 138,700
Weighted-average interest rate:
As of the period-end (as a percent)	0.10%	0.10%	0.10%	0.10%
Paid during the period (as a percent)	0.10%	0.68%	0.12%	0.99%