Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Contingent Liabilities [Abstract]
Receivables balance decline	$ 2,100		$ 2,100
Provision for loss reimbursement on sold loans	50	$ 20	80	$ 70
Reserve for loss reimbursement on sold mortgage loans	$ 850		$ 850		$ 670