Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Components of the Company’s stock-based compensation expense

The following table summarizes the components of the Company’s stock-based compensation expense included in general and administrative expenses in the consolidated financial statements:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013			2012
	(In millions)
Total stock-based compensation:
Equity classified award expense	$	1.2		$	2.2		$	7.1		$	8.8
Liability classified award (credit) expense	(0.8		)	1.9			(0.9		)	2.4
Total pretax stock-based compensation expense	0.4			4.1			6.2			11.2
Tax benefit	(0.2		)	(1.6		)	(2.4		)	(4.3		)
Total stock-based compensation expense, net of tax	$	0.2		$	2.5		$	3.8		$	6.9

Schedule of stock option valuation assumptions

The following summarizes the assumptions used in the Black-Scholes model:

Risk-free interest rate	0.78	%
Weighted average historical volatility	83.4	%
Dividend yield	4.15	%
Expected years until exercise	4.6
Forfeitures	11.0	%
Weighted average fair value of options granted	$36.00

Schedule of stock option activity

Option balances as of September 30, 2013 and activity related to stock options for the nine months ended September 30, 2013 were as follows:

	Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2012	958,246		$39.67
Granted	81,328		$72.28
Exercised	(153,454	)	$36.40
Forfeited	(39,243	)	$55.78
Outstanding at September 30, 2013	846,877		$42.65	6.24	$	21,878,000
Vested at September 30, 2013 and Expected to Vest	824,671		$42.14	6.17	$	21,683,000
Exercisable at September 30, 2013	637,782		$37.31	5.49	$	19,650,000

Schedule of restricted stock unit activity

Equity Classified Awards - Restricted Stock and Restricted Stock Units

Outstanding balances as of September 30, 2013 and activity related to restricted stock and restricted stock units for the nine months ended September 30, 2013 were as follows:

	Restricted Stock		Weighted Average Grant Date Fair Value	Restricted Stock Units		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2012	346,563		$44.74	33,242		$41.19
Granted	88,606		$72.16	15,387		$72.04
Conversion of cash-settled restricted stock units	—		—	37,184		$72.28
Released	(112,625	)	$30.09	(39,000	)	$54.66
Forfeited	(53,551	)	$54.76	—		—
Outstanding at September 30, 2013	268,993		$57.84	46,813		$64.57

Liability Classified Awards - Restricted Stock Units

	Restricted Stock Units		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2012	37,184		$66.13
Conversion to stock-settled restricted stock units	(37,184	)	$72.28
Outstanding at September 30, 2013	—		—