Financial Services (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Financial Services [Line Items]
Mortgage loans in process	$ 193,100	$ 37,600
Mortgage loans held for sale	187,494	185,246
Mortgage loans held for sale aggregate outstanding principal balance	$ 179,900	$ 179,300
Weighted Average [Member]
Financial Services [Line Items]
Interest rate	2.90%	3.90%