Investments Net Investment Income by Major Category (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Investment Income [Line Items]
Net investment income	$ 3,871	$ 3,083	$ 2,823
Investment expenses	(206)	(142)	(140)
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	20,342	9,705	8,088
Net income	20,342	9,705	8,088
Weighted-average shares-basic	16,100,882	10,607,751	10,442,034
Earnings Per Share, Basic	$ 1.26	$ 0.91	$ 0.77
Weighted Average Number Diluted Shares Outstanding Adjustment	82,216	47,773
Weighted-average shares-diluted	16,183,098	10,655,524	10,442,034
Earnings Per Share, Diluted	$ 1.26	$ 0.91	$ 0.77
Investment Income, Net	3,665	2,941	2,683
Debt Securities [Member]
Net Investment Income [Line Items]
Net investment income	(3,512)	(2,902)	(2,628)
Equity Securities [Member]
Net Investment Income [Line Items]
Net investment income	(280)	(138)	(142)
Cash and Cash Equivalents [Member]
Net Investment Income [Line Items]
Net investment income	(31)	(43)	(19)
Partnership Interest [Member]
Net Investment Income [Line Items]
Net investment income	$ (48)	$ 0	$ (34)