Fair Value of Financial Assets and Financial Liabilities (Level 3 Reconciliation) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Equity Securities Available-for-Sale
Ending balance	$ 1,073
Interest Rate Swap
Ending balance	(757)
Recurring Basis | Interest rate swap
Interest Rate Swap
Beginning balance	(1,030)	$ (1,419)
Included in earnings	0	0
Included in other comprehensive income	273	389
Purchases:	0	0
Sales:	0	0
Issuances:	0	0
Settlements:	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	(757)	(1,030)
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 Available-for-Sale
Beginning balance:	1,258	1,173
Included in earnings	0	0
Included in other comprehensive income	114	85
Purchases:	46	0
Sales:	(345)	0
Issuances:	0	0
Settlements:	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	1,073	1,258
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