Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Contingent Liabilities [Abstract]
Receivables balance decline	$ 4,500		$ 4,500
Provision for loss reimbursement on sold loans	20	$ 20	30	$ 50
Reserve for loss reimbursement on sold mortgage loans	$ 800		$ 800		$ 700