Real Estate (Impairments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Real Estate [Abstract]
Impairment losses – real estate and other charges, net of recoveries	$ 3,635	$ 78	$ 9,718	$ 1,245