Fair Value of Financial Assets and Financial Liabilities (Level 3 Reconciliation) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Equity Securities
Ending balance	$ 1,056
Interest Rate Swap
Ending balance	(346)
Recurring Basis | Interest rate swap
Interest Rate Swap
Beginning balance	(608)	$ (1,030)
Included in earnings	0	0
Included in other comprehensive income	262	422
Purchases:	0	0
Sales:	0	0
Issuances:	0	0
Settlements:	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	(346)
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held	0	0
Recurring Basis | Total fixed maturities
Equity Securities
Beginning balance:	1,073	1,258
Included in earnings	(17)	0
Included in other comprehensive income	0	114
Purchases:	0	46
Sales:	0	(345)
Issuances:	0	0
Settlements:	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	1,056
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held	$ 0	$ 0