Loan Servicing (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Transfers and Servicing of Financial Assets [Abstract]
Serviced sold mortgage loans	$ 0	$ 1,380,000	$ 0	$ 1,380,000	$ 1,390,000
Serviced sold mortgage loans with recourse	2,400	2,600	2,400	2,600	$ 2,500
Servicing fees included in other service income	900	$ 0	1,800	$ 0
Mortgage Loans Sold with Recourse, Reserve	$ 27		$ 27