Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Litigation settlement expense					$ 2,200
Notification costs and other estimated expenses					100
Provision for loss reimbursement on sold loans	$ 20	$ 0	$ 50	$ (20)
Reserve for loss reimbursement on sold mortgage loans	$ 500		$ 500		$ 600