Debt (Tables)

9 Months Ended

Sep. 30, 2012

Long-term Debt, Unclassified [Abstract]

Schedule of Long Term Debt Instruments

The carrying value of debt is composed of the following as of the dates indicated (in millions):

Description	Maturity Date	September 30, 2012			December 31, 2011
Credit facility	August 22, 2016	$	10.0		$	60.0
7.625% senior notes	February 1, 2017	150.0			150.0
New 4.0% Notes, $105.3 million principal amount	June 15, 2014	100.2			98.2
New 4.25% Notes, $97.0 million principal amount	December 15, 2014	91.6			89.9
Original 4.0% Notes	June 15, 2014	9.7			9.7
Original 4.25% Notes	December 15, 2014	3.0			3.0
Capital lease obligations, weighted average interest rate of 3.2%	In installments through June 2019	54.5			40.6
Notes payable for equipment, weighted average interest rate of 3.8%	In installments through October 2015	34.0			43.4
Total debt		$	453.0		$	494.8
Less current maturities		(42.4		)	(34.1		)
Long-term debt		$	410.6		$	460.7

Schedule of Convertible Notes, Carrying Amount Details

The carrying values of the debt and equity components of the New Notes as of September 30, 2012 were as follows (in millions):

	September 30, 2012
	New 4.0% Notes			New 4.25% Notes
Principal amount	$	105.3		$	97.0
Unamortized debt discount and financing costs	(5.1		)	(5.4		)
Net carrying amount of debt component	$	100.2		$	91.6
Carrying amount of equity component	$	8.9		$	8.5

Schedule of Interest Expense, Net, Details

Details of interest expense, net, classified within continuing operations for the periods indicated is as follows (in millions):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Interest expense:
Contractual and other interest expense	$	6.9		$	6.6		$	20.5		$	19.3
Accretion of senior convertible note discount	1.2			1.2			3.7			3.0
Deferred financing costs and commitment fees	1.4			1.3			4.0			3.3
Total interest expense	$	9.5		$	9.1		$	28.2		$	25.6
Interest income	(0.1		)	(0.1		)	(0.3		)	(0.4		)
Interest expense, net	$	9.4		$	9.0		$	27.9		$	25.2