Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Summary of unaudited quarterly results of operations

	2015
(In thousands, except per share amounts)	December 31		September 30		June 30		March 31
Net premiums earned	$	89,378	$	83,694	$	78,361	$	75,038
Other revenues	8,098		8,042		5,706		4,973
Provision for losses and LAE	4,199		3,393		2,314		1,999
Other underwriting and operating expenses	29,627		28,714		27,148		27,498
Income before income taxes	63,650		59,629		54,605		50,514
Net income	44,479		40,821		37,193		34,838
Basic earnings per Common Share	$	0.49	$	0.45	$	0.41	$	0.39
Diluted earnings per Common Share	$	0.48	$	0.44	$	0.41	$	0.38
Basic weighted average Common Shares outstanding	90,454		90,418		90,344		90,185
Diluted weighted average Common Shares outstanding	91,918		91,841		91,674		91,514

	2014
(In thousands, except per share amounts)	December 31		September 30		June 30		March 31
Net premiums earned	$	67,814	$	60,323	$	50,342	$	44,750
Other revenues	4,928		4,298		3,941		3,071
Provision for losses and LAE	3,049		1,391		966		902
Other underwriting and operating expenses	25,656		24,469		23,648		23,459
Income before income taxes	44,037		38,761		29,669		23,460
Net income	28,866		25,070		19,555		15,006
Basic earnings per Common Share	$	0.34	$	0.30	$	0.23	$	0.18
Diluted earnings per Common Share	$	0.33	$	0.29	$	0.23	$	0.18
Basic weighted average Common Shares outstanding	86,134		83,640		83,276		82,864
Diluted weighted average Common Shares outstanding	87,950		85,028		84,706		84,696