Fair Value of Financial Assets and Financial Liabilities (Level 3 Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Equity Securities
Ending balance	$ 1,102
Interest Rate Swap
Ending balance	(441)
Recurring Basis | Interest rate swap
Interest Rate Swap
Beginning balance	(608)	$ (1,030)
Included in earnings	0	0
Included in other comprehensive income	167	422
Purchases:	0	0
Sales:	0	0
Issuances:	0	0
Settlements:	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	(441)
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	29	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	1,102
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