Earnings Per Share: (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share ("EPS"):

Number of shares used to compute basic and diluted earnings per share

	Three Months Ended September 30, 2012					Three Months Ended September 30, 2011
			Weighted	Per					Weighted	Per
			Average	Common					Average	Common
	Net		Common	Share		Net			Common	Share
	Income		Shares	Amount		Income			Shares	Amount
Basic:
Income from continuing operations	$	19.0	42.5	$	0.45	$	18.4		41.7	$	0.44
(Loss) income from discontinued operations	0.1		42.5	—		(9.7		)	41.7	(0.23		)
	19.1			$	0.45	8.7				$	0.21
Effect of Dilutive Securities			0.3						0.4
Diluted:
Income from continuing operations	19.0		42.8	0.45		18.4			42.1	0.44
(Loss) income from discontinued operations	0.1		42.8	—		(9.7		)	42.1	(0.23		)
	$	19.1		$	0.45	$	8.7			$	0.21

	Nine Months Ended September 30, 2012							Nine Months Ended September 30, 2011
				Weighted	Per						Weighted	Per
				Average	Common						Average	Common
	Net			Common	Share			Net			Common	Share
	Income			Shares	Amount			Income			Shares	Amount
Basic:
Income from continuing operations	$	36.3		42.2	$	0.86		$	39.1		41.6	$	0.94
(Loss) income from discontinued operations	(6.0		)	42.2	(0.14		)	(6.5		)	41.6	(0.16		)
	30.3				$	0.72		32.6				$	0.78
Effect of Dilutive Securities				0.4							0.4
Diluted:
Income from continuing operations	36.3			42.6	0.85			39.1			42.0	0.94
(Loss) income from discontinued operations	(6.0		)	42.6	(0.14		)	(6.5		)	42.0	(0.17		)
	$	30.3			$	0.71		$	32.6			$	0.77