Equity (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018	Dec. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Beginning Balance		$ 63	$ 0	$ 0
Unrealized appreciation (depreciation) before reclassifications	[1]	(557)	63	0
Amounts reclassified from accumulated other comprehensive income		0	0	0
Net current-period other comprehensive income (loss)		(557)	63	0
Ending Balance		$ (481)	$ 63	0
ASU 2018-02 effect
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustment due to ASU 2018-02	[1]			$ 0	$ 13	$ 0

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