Quarterly Information

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data [Abstract]

Quarterly Financial Data (Unaudited)

(17) Quarterly Financial Data (Unaudited)

	Fourth Quarter				Third Quarter				Second Quarter				First Quarter
	2012		2011		2012		2011		2012		2011		2012		2011
Net earned premium	$	566,503	$	550,183	$	563,650	$	544,256	$	565,331	$	524,251	$	547,141	$	508,480
Other revenue		85,840		64,738		68,023		66,268		66,957		60,601		62,382		55,228
Total revenue		652,343		614,921		631,673		610,524		632,288		584,852		609,523		563,708
Loss and LAE expense		335,744		337,007		304,014		380,372		336,825		334,282		328,928		347,586
Other expense		167,070		165,484		174,040		147,360		161,144		153,665		163,635		153,243
Total expense		502,814		502,491		478,054		527,732		497,969		487,947		492,563		500,829
Earnings before income taxes		149,529		112,430		153,619		82,792		134,319		96,905		116,960		62,879
Income tax expense		41,428		34,092		46,557		22,355		40,826		27,427		34,376		15,889
Net earnings	$	108,101	$	78,338	$	107,062	$	60,437	$	93,493	$	69,478	$	82,584	$	46,990
Earnings per share
Basic	$	1.07	$	0.74	$	1.06	$	0.56	$	0.92	$	0.61	$	0.80	$	0.41
Diluted		1.06		0.74		1.05		0.56		0.92		0.61		0.79		0.41
Weighted-average shares outstanding
Basic		99,686		104,260		99,424		106,919		99,563		111,389		102,034		113,754
Diluted		99,926		104,356		99,700		107,048		99,851		111,757		102,193		114,106

The sum of earnings per share for the quarters may not equal the annual amounts due to rounding.