Real Estate (Impairments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Real Estate [Abstract]
Impairment losses – real estate and other charges, net of recoveries	$ 3,835	$ (39)	$ 6,083	$ 1,167