Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Gross premiums written	$ 82,905	$ 84,245	$ 160,102	$ 159,184
Net premiums written	76,372	78,346	149,233	149,824
Net premiums earned	66,017	58,671	133,561	114,667
Net investment income	7,677	9,765	15,961	19,799
Net realized investment gains:
Other than temporary impairment losses on investments	(37)	(1,010)	(62)	(1,053)
Other net realized investment gains	39,918	3,816	39,130	9,616
Total net realized investment gains	39,881	2,806	39,068	8,563
Other income	155	247	323	301
Total revenues	113,730	71,489	188,913	143,330
Losses and Expenses:
Net losses and loss adjustment expenses	38,270	34,924	76,842	66,712
Acquisition costs and other underwriting expenses	27,171	24,472	53,656	48,949
Corporate and other operating expenses	3,172	2,472	6,133	4,817
Interest expense	319	1,181	510	2,354
Income before income taxes	44,798	8,440	51,772	20,498
Income tax expense (benefit)	11,590	(224)	9,741	(531)
Net income	$ 33,208	$ 8,664	$ 42,031	$ 21,029
Net income
Basic	$ 1.32	$ 0.35	$ 1.67	$ 0.84
Diluted	$ 1.31	$ 0.34	$ 1.66	$ 0.84
Weighted-average number of shares outstanding
Basic	25,128,280	25,049,888	25,121,171	25,052,488
Diluted	25,312,938	25,119,035	25,301,783	25,120,897