Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Debt Instrument [Line Items]
Long-term debt outstanding	$ 82,407	$ 83,516	$ 95,316
FHLB Advances
Debt Instrument [Line Items]
Long-term debt outstanding	$ 74,216	75,216
Weighted average rate percentage	2.09%
Trust preferred subordinated debt
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000	5,000
Interest rate percentage	6.39%
Trust preferred subordinated debt issued	$ 5,000
Loan payable to local bank, 4.5% | Loan payable to local bank
Debt Instrument [Line Items]
Long-term debt outstanding	$ 2,191	2,300
Interest rate percentage	4.50%
Period of fixed interest rate	5 years
Loan payable to local bank, 5.25% | Loan payable to local bank
Debt Instrument [Line Items]
Long-term debt outstanding	$ 1,000	$ 1,000
Loan payable to local bank, 5.25% | Loan payable to local bank | Wall Street Journal Prime Rate
Debt Instrument [Line Items]
Basis spread on prime rate, percentage	0.25%
Effective rate, percentage	5.25%