Loan Servicing (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Transfers and Servicing of Financial Assets [Abstract]
Serviced sold mortgage loans	$ 1,310,000	$ 1,270,000	$ 1,310,000	$ 1,270,000	$ 1,280,000
Serviced sold mortgage loans with recourse	4,300	5,700	4,300	5,700	5,400
Mortgage Loans Sold with Recourse, Reserve	270		270		$ 454
Servicing fees included in other service income	$ 900	$ 800	$ 2,500	$ 2,500