Investments Net Investment Income by Major Category (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Investment Income [Line Items]
Net investment income	$ 1,617	$ 831	$ 3,084	$ 1,555
Investment Income, Investment Expense	(79)	(41)	(148)	(119)
Investment Income, Net	1,538	790	2,936	1,436
Debt Securities [Member]
Net Investment Income [Line Items]
Net investment income	1,349	769	(2,626)	(1,443)
Equity Securities [Member]
Net Investment Income [Line Items]
Net investment income	240	48	(366)	(81)
Cash and Cash Equivalents [Member]
Net Investment Income [Line Items]
Net investment income	4	10	(5)	(20)
Partnership Interest [Member]
Net Investment Income [Line Items]
Net investment income	$ 24	$ 4	$ (87)	$ (11)