Debt (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Schedule of Carrying Values of Long-Term Debt

The following table provides details of the carrying values of long-term debt as of the dates indicated (in millions):

Description	Maturity Date	September 30, 2014			December 31, 2013
Senior secured credit facility	October 29, 2018	$	449.5		$	53.0
4.875% senior notes	March 15, 2023	400.0			400.0
2011 4.0% senior convertible notes	June 15, 2014	—			103.8
2011 4.25% senior convertible notes	December 15, 2014	96.4			94.5
2009 4.0% senior convertible notes	June 15, 2014	—			9.6
2009 4.25% senior convertible notes	December 15, 2014	3.0			3.0
Other credit facilities	Varies	4.8			—
Capital lease obligations, weighted average interest rate of 2.8%	In installments through June 13, 2021	163.6			126.0
Notes payable, equipment, weighted average interest rate of 2.9%	In installments through September 1, 2018	42.8			26.9
Total debt		$	1,160.1		$	816.8
Less current maturities		(71.8		)	(51.4		)
Long-term debt		$	1,088.3		$	765.4

Schedule of Interest Expense, Net

The following table provides details of interest expense, net, for the periods indicated (in millions):

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
	2014			2013		2014			2013
Interest expense:
Contractual and other interest expense	$	11.3		$	10.4	$	31.6		$	27.9
Accretion of senior convertible note discount	0.6			1.3		3.4			3.9
Amortization of deferred financing costs	0.8			1.0		2.7			3.0
Total interest expense	$	12.7		$	12.7	$	37.7		$	34.8
Interest income	(0.1		)	—		(0.1		)	(0.3		)
Interest expense, net	$	12.6		$	12.7	$	37.6		$	34.5