Equity (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018		Mar. 31, 2017
Schedule of Accumulated Other Comprehensive Income (Loss) [Abstract]
Unrealized loss on securities, before tax	$ (234)		$ 0
Tax expense	58	[1]	0
Unrealized loss on securities, net of tax	$ (176)		$ 0

[1] Due to the implementation of ASU 2018-02, the tax rate changed from 37.75% to 24.5%.