Equity Equity (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Accumulated Other Comprehensive Income (Loss) [Abstract]
Unrealized appreciation on securities, before tax	$ 102	$ 0	$ 0
Tax expense	(39)	0	0
Unrealized appreciation on securities, net of tax	$ 63	$ 0	$ 0