Investments Net Investment Income by Major Category (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Investment Income [Line Items]
Net investment income	$ 831	$ 777	$ 1,555	$ 1,524
Investment Income, Investment Expense	(41)	(23)	(119)	(94)
Investment Income, Net	790	754	1,436	1,430
Cash and Cash Equivalents [Member]
Net Investment Income [Line Items]
Net investment income	10	4	20	9
Equity Securities [Member]
Net Investment Income [Line Items]
Net investment income	48	36	81	70
Debt Securities [Member]
Net Investment Income [Line Items]
Net investment income	769	737	1,443	1,445
Partnership Interest [Member]
Net Investment Income [Line Items]
Net investment income	$ 4	$ 0	$ 11	$ 0