Investments, Aggregated by Industry (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments aggregated by industry [Abstract]
Carrying value	$ 208,833	$ 205,324
Amortized cost	202,928	210,450
Carrying value	238,493	238,385
Amortized cost	223,613	231,333
Unrealized gains (losses)	14,880	7,052
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]
Investments aggregated by industry [Abstract]
Carrying value	16,040	22,234
Amortized cost	15,522	22,119
Unrealized gains (losses)	518	115
Obligations of States and Political Subdivisions [Member]
Investments aggregated by industry [Abstract]
Carrying value	18,446	25,479
Amortized cost	17,264	25,410
Unrealized gains (losses)	1,182	69
Utilities and Telecom [Member]
Investments aggregated by industry [Abstract]
Carrying value	22,202	18,975
Amortized cost	19,489	17,888
Unrealized gains (losses)	2,713	1,087
Financial Services [Member]
Investments aggregated by industry [Abstract]
Carrying value	62,382	59,463
Amortized cost	59,402	58,167
Unrealized gains (losses)	2,980	1,296
Other Business - Diversified [Member]
Investments aggregated by industry [Abstract]
Carrying value	66,585	61,158
Amortized cost	66,867	66,176
Unrealized gains (losses)	(282)	(5,018)
Other Consumer - Diversified [Member]
Investments aggregated by industry [Abstract]
Carrying value	43,606	41,146
Amortized cost	35,837	31,643
Unrealized gains (losses)	7,769	9,503
Other Investment [Member]
Investments aggregated by industry [Abstract]
Carrying value	9,232	9,930
Amortized cost	$ 9,232	$ 9,930

Amount of other investments securities categorized neither as held-to-maturity nor trading.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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