Real Estate (Impairments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate [Abstract]
Impairment losses – real estate and other charges, net of recoveries	$ 78	$ 4,917	$ 1,245	$ 7,680