Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Unaudited quarterly financial data

Unaudited quarterly financial data - current year:
Table:	18.1a
2018:		Quarter												Full
(In thousands, except per share data)		First			Second			Third			Fourth			Year
Net premiums earned		$	232,107		$	246,964		$	250,426		$	245,665		$	975,162
Investment income, net of expenses		32,121			34,502			36,380			38,328			141,331
Realized (losses) gains		(329		)	(1,897		)	1,114			(241		)	(1,353		)
Other revenue		1,871			2,431			2,525			1,881			8,708
Loss incurred, net		23,850			(13,455		)	(1,518		)	27,685			36,562
Underwriting and other expenses, net		61,895			57,933			60,069			63,239			243,136
Provision for income tax		36,388			50,708			49,994			36,963			174,053
Net income		143,637			186,814			181,900			157,746			670,097
Income per share (a) (b):
Basic		0.39			0.51			0.50			0.44			1.83
Diluted		0.38			0.49			0.49			0.43			1.78

Unaudited quarterly financial statements - prior year:
Table:	18.1b
2017:		Quarter												Full
(In thousands, except per share data)		First			Second			Third			Fourth			Year
Net premiums earned		$	229,103		$	231,136		$	237,083		$	237,425		$	934,747
Investment income, net of expenses		29,477			29,716			30,402			31,276			120,871
Realized gains (losses)		(125		)	(52		)	(50		)	458			231
Other revenue		2,425			2,512			2,925			2,343			10,205
Loss incurred, net		27,619			27,339			29,747			(30,996		)	53,709
Underwriting and other expenses, net		59,304			55,292			56,146			57,042			227,784
Loss on debt extinguishment		—			65			—			—			65
Provision for income tax		84,159			61,994			64,440			218,142			428,735
Net income		89,798			118,622			120,027			27,314			355,761
Income per share (a) (b):
Basic		0.26			0.32			0.32			0.07			0.98
Diluted		0.24			0.31			0.32			0.07			0.95

^(a)  Due to the use of weighted average shares outstanding when calculating earnings per share, the sum of the quarterly per share data may not equal the per share data for the year.

^(b)  In periods where convertible debt instruments are dilutive to earnings per share the “if-converted” method of computing diluted EPS requires an interest expense adjustment, net of tax, to net income available to shareholders. See Note 4 – “Earnings Per Share” for further discussion on our calculation of diluted EPS.