Equity (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	Jan. 01, 2018		Dec. 31, 2016
New Accounting Pronouncement, Early Adoption [Line Items]
Beginning Balance	$ (100)		$ 0	$ 63		$ 0
Accumulated other comprehensive income (loss)	(100)		0	63		0	$ 63		$ 0
Unrealized appreciation (loss) before reclassifications	35	[1]	20	(141)	[2]	20
Amounts reclassified from accumulated other comprehensive income	0		0	0		0
Net current-period other comprehensive income (loss)	35		20	(141)		20
Ending Balance	$ (65)		$ 20	$ (65)		$ 20
ASU 2018-02 effect
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustment due to ASU 2018-02							13	[2]	$ 0
ASU 2018-02 end balance
New Accounting Pronouncement, Early Adoption [Line Items]
Accumulated other comprehensive income (loss)							$ 76

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

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