Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-Based Compensation

Summary of Restricted Stock Unit Awards Activity

						Aggregate
			Weighted Average			Intrinsic
	Number		Grant Date			Value
	of Shares		Fair Value			(in thousands)
Total Granted and Unvested - January 1, 2013	1,141,666		$	18.12		$	15,641
Vested	(849,999	)	$	19.91		$	17,505
Granted	246,668		$	19.87		$	6,487
Forfeited	(176,667	)	$	13.66		—
Total Granted and Unvested	361,668		$	17.30		$	9,512
Approved for grant	957,500				(a)	$	25,182
Total Awarded and Unvested — December 31, 2013	1,319,168		n.a.			$	34,694

(a) Grant date fair value cannot be determined currently because the related performance targets for future years have not yet been established by the Compensation Committee.

Vesting Schedule of Outstanding Unvested Restricted Stock Unit Awards

	Number
Vesting Date	of Awards
2014	286,668
2015	342,500
2016	202,500
2017	442,500
2018	36,000
2019	9,000
Total	1,319,168

Summary of Stock Options Activity

			Weighted Average
	Number		Grant Date			Exercise
	of Shares		Value			Price
Total Granted and Outstanding - January 1, 2013	1,315,465		$	9.72		$	18.91
Granted	200,000		$	7.90		$	20.80
Exercised	(80,465	)	$	6.71		$	13.16
Forfeited	(140,000	)	$	6.76		—
Total Granted and Outstanding	1,295,000		$	9.94		$	20.20
Approved for grant	800,000				(a)	$	12.61
Total Awarded and Outstanding — December 31, 2013	2,095,000		n.a.			$	17.30

(a)  Grant date fair value cannot be determined currently because the related performance targets for future years have not yet been established by the Compensation Committee.

Key Assumptions Used in Estimating Grant Date Fair Value of Stock Option Awards

	Grant dates established during
	2013				2012				2011
Awarded during	2013		2009 (1)		2012		2009 (1)		2011		2011		2011		2009 (1)
Number of options	50,000		150,000		15,000		150,000		140,000		30,000		40,465		150,000
Risk-free interest rate	1.64	%	0.48	%	1.12	%	0.88	%	1.13	%	1.25	%	0.89	%	2.74	%
Expected life of options (years)	5.7		3.6		7.3		4.4		6.0		6.5		5.0		6.5
Expected volatility of underlying stock	51.81	%	51.00	%	50.59	%	53.89	%	49.86	%	48.70	%	51.62	%	46.94	%
Expected quarterly dividends (per share)	—		—		—		—		—		—		—		—

(1) During 2009, the Compensation Committee approved the award of 750,000 stock options that vest in five equal annual installments from 2010 to 2014 subject to the achievement of pre-tax income performance targets established by the Compensation Committee for fiscal years 2009 to 2013. The Compensation Committee has established the performance targets for fiscal years 2011, 2012 and 2013, and these tranches were deemed granted for accounting purposes.

Restricted Stock Unit Awards

Stock-Based Compensation

Compensation Expense Included in General and Administrative Expenses

	Year ended December 31,
	2013		2012		2011
	(in millions)
Restricted Stock Compensation Expense	$	4.9	$	7.1	$	5.7
Related Income Tax Benefit	$	1.9	$	1.5	$	2.5

Stock Options

Stock-Based Compensation

Compensation Expense Included in General and Administrative Expenses

	Year ended December 31,
	2013		2012		2011
	(in millions)
Stock Option Compensation Expense	$	1.7	$	2.4	$	3.1
Related Income Tax Benefit	$	0.7	$	1.0	$	1.3