Borrowings - Long-term Debt (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Long-term debt
Notes payable, FHLB, ranging in original maturity from 5 to 10 years, collateralized by FHLB deposits, residential and commercial real estate loans and FHLB stock	$ 35,101	$ 35,600
Term Loan		48,000
Total long-term borrowings	$ 35,101	$ 83,600
FHLB advances
Long-term debt
Weighted average rate (as a percent)	0.48%	1.53%
FHLB advances | Minimum
Long-term debt
Notes payable original maturity term	5 years	5 years
Interest rate (as a percent)	0.05%	1.25%
FHLB advances | Maximum
Long-term debt
Notes payable original maturity term	10 years	10 years
Interest rate (as a percent)	3.04%	3.04%