Investments Net Investment Income by Major Category (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Investment Income [Line Items]
Net investment income	$ 1,089	$ 807	$ 2,644	$ 2,331
Investment Income, Investment Expense	(40)	(23)	(159)	(117)
Investment Income, Net	1,049	784	2,485	2,214
Cash and Cash Equivalents [Member]
Net Investment Income [Line Items]
Net investment income	8	16	28	25
Equity Securities [Member]
Net Investment Income [Line Items]
Net investment income	93	34	174	104
Debt Securities [Member]
Net Investment Income [Line Items]
Net investment income	983	757	2,426	2,202
Partnership Interest [Member]
Net Investment Income [Line Items]
Net investment income	$ 5	$ 0	$ 16	$ 0