Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Net premiums earned	[1]	$ 432,880	$ 328,145	$ 276,011
Net investment income		22,048	18,095	14,483
Commissions and other income		9,932	5,308	5,275
Net realized gains (losses) on investments, excluding impairment losses		(6,632)	7,366	26,498
Other-than-temporary impairment losses on investments		(19)	(149)	(5,743)
Net unrealized gains (losses) on equity securities and limited partnership investments		(19,040)	12,469	2,473
Net realized and unrealized gains (losses) on investments		(25,691)	19,686	23,228
Total revenues		439,169	371,234	318,997
Expenses:
Losses and loss expenses incurred		345,864	247,518	186,481
Other operating expenses		137,177	113,594	89,462
Total expenses		483,041	361,112	275,943
Income (loss) before federal income tax expense (benefit)		(43,872)	10,122	43,054
Federal income tax expense (benefit)		(9,797)	(8,201)	14,109
Net income (loss)		$ (34,075)	$ 18,323	$ 28,945
Per share data:
Basic and diluted earnings (loss) (in dollars per share)		$ (2.28)	$ 1.21	$ 1.92
Dividends paid to shareholders (in dollars per share)		$ 1.12	$ 1.08	$ 1.04

[1] Included in Ceded to Other Companies is $0, $0 and $86 for 2018, 2017 and 2016, respectively, relating to retrocessions associated with premiums assumed from other companies. percentage of Amount Assumed to Net above considers the impact of this retrocession.