- Rate and Maturity Information on Federal Home Loan Bank Advances and Other Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Federal Home Loan Bank, Advances [Line Items]
Other long-term debt	$ 72,841	$ 139,140
Bullet maturity – fixed rate | Fixed Rate
Federal Home Loan Bank, Advances [Line Items]
Other long-term debt	$ 72,841	118,131
Bullet maturity – fixed rate | Fixed Rate | Weighted average rate
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, advances, interest rate at period end	1.32%
Bullet maturity – fixed rate | Fixed Rate | Minimum
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, advances, interest rate at period end	1.31%
Bullet maturity – fixed rate | Fixed Rate | Maximum
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank, advances, interest rate at period end	2.45%
Convertible-fixed
Federal Home Loan Bank, Advances [Line Items]
Other long-term debt	$ 0	$ 21,009