Servicing Rights (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Transfers and Servicing [Abstract]
Serviced unpaid principal balance	$ 132,000,000		$ 132,000,000		$ 181,000,000
Unpaid principal balance for loans sold during period	0	$ 5,300,000	0	$ 55,500,000
Servicing revenue	$ 100,000	$ 400,000	$ 600,000	$ 1,300,000