Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Summary of unaudited consolidated statements of income by quarter

The following are the unaudited consolidated statements of income by quarter for the years ended December 31, 2015 and 2014:

	Quarter Ended
	December 31, 2015			September 30, 2015			June 30, 2015			March 31, 2015
REVENUES:
Gross premiums written	$	632.3		$	754.1		$	826.0		$	880.6
Premiums ceded	(167.5		)	(147.1		)	(222.3		)	(108.1		)
Net premiums written	464.8			607.0			603.7			772.5
Change in unearned premiums	158.0			43.7			42.7			(204.0		)
Net premiums earned	622.8			650.7			646.4			568.5
Net investment income	49.1			45.7			42.8			44.5
Net realized investment (losses) gains	(38.8		)	(113.6		)	(20.2		)	45.0
Other income	1.0			0.7			0.9			0.9
	634.1			583.5			669.9			658.9
EXPENSES:
Net losses and loss expenses	412.7			416.9			431.5			325.2
Acquisition costs	96.0			100.1			100.6			78.7
General and administrative expenses	95.0			105.8			108.4			97.1
Other expense	1.9			1.3			1.2			1.8
Amortization of intangible assets	3.7			2.7			2.8			0.6
Interest expense	18.1			14.5			14.5			14.3
Foreign exchange loss (gain)	0.9			(0.8		)	1.3			9.9
	628.3			640.5			660.3			527.6
Income (loss) before income taxes	5.8			(57.0		)	9.6			131.3
Income tax expense (benefit)	4.0			(5.3		)	0.1			7.0
NET INCOME (LOSS)	$	1.8		$	(51.7	)	$	9.5		$	124.3
PER SHARE DATA
Basic earnings (loss) per share	$	0.02		$	(0.57	)	$	0.10		$	1.30
Diluted earnings (loss) per share	$	0.02		$	(0.57	)	$	0.10		$	1.27
Weighted average common shares outstanding	90,934,107			90,882,511			92,441,730			95,935,551
Weighted average common shares and common share equivalents outstanding	92,422,422			90,882,511			93,984,226			97,577,029

	Quarter Ended
	December 31, 2014			September 30, 2014			June 30, 2014			March 31, 2014
REVENUES:
Gross premiums written	$	565.7		$	707.9		$	760.4		$	901.4
Premiums ceded	(137.9		)	(139.2		)	(206.5		)	(129.8		)
Net premiums written	427.8			568.7			553.9			771.6
Change in unearned premiums	145.7			(27.0		)	(16.7		)	(241.3		)
Net premiums earned	573.5			541.7			537.2			530.3
Net investment income	49.1			43.4			36.8			47.6
Net realized investment (losses) gains	(15.4		)	(35.1		)	85.3			54.2
Other income	1.1			1.0			—			—
	608.3			551.0			659.3			632.1
EXPENSES:
Net losses and loss expenses	273.0			336.1			314.9			275.3
Acquisition costs	80.7			72.4			74.3			67.7
General and administrative expenses	100.9			88.3			96.2			80.3
Other expense	2.0			6.6			—			—
Amortization of intangible assets	0.6			0.6			0.7			0.6
Interest expense	14.3			14.3			14.6			14.5
Foreign exchange (gain) loss	—			0.3			0.7			—
	471.5			518.6			501.4			438.4
Income before income taxes	136.8			32.4			157.9			193.7
Income tax expense	6.2			1.5			6.2			16.6
NET INCOME	$	130.6		$	30.9		$	151.7		$	177.1
PER SHARE DATA
Basic earnings per share	1.35			0.32			1.55			1.78
Diluted earnings per share	1.33			0.31			1.52			1.74
Weighted average common shares outstanding	96,386,796			96,458,231			97,809,639			99,545,187
Weighted average common shares and common share equivalents outstanding	98,394,432			98,444,238			99,724,802			101,584,662