Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The following table sets out the weighted average assumptions used to estimate the fair value of the SSARs granted using the Black-Scholes option-pricing model in the first six months of the respective years noted.



	2015	2014
Expected stock price volatility	54.4%	57.5%
Expected dividend yield	—%	—%
Risk-free interest rate	1.5%	1.5%
Expected life of options (in years)	6 years	5 years
Weighted average fair value of options and SSARs granted	$8.80	$9.03

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity

The following table summarizes stock options and SSARs outstanding as of June 30, 2015, as well as activity during the six month period then ended.



Share amounts in thousands	Options and SSARs		Weighted Average Exercise Price		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Options and SSARs outstanding at January 1, 2015	7,004		$	14.19
Options and SSARs granted	379		17.04
Options and SSARs exercised	(1,141	)	11.45
Options and SSARs canceled	(281	)	26.41
Options and SSARs outstanding at June 30, 2015	5,961		14.32		4.7	$	28.3
Vested and expected to vest at June 30, 2015⁽¹⁾	5,663		—		—	$	26.9
Options and SSARs exercisable at June 30, 2015	5,185		$	13.78	4.1	$	28.3

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

The following table summarizes incentive share awards outstanding as of June 30, 2015 as well as activity during the six months then ended.



	Shares		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Incentive share awards outstanding at January 1, 2015	593,613
Incentive share awards granted	250,129
Incentive share awards vested	(273,995	)
Incentive share awards canceled	(15,083	)
Incentive shares outstanding at June 30, 2015	554,664		1.7	$	9.5
Vested and expected to vest at June 30, 2015⁽¹⁾	526,931		—	$	9.0

Restricted Stock Activity [Table Text Block]

The following table summarizes the restricted stock outstanding as of June 30, 2015 as well as activity during the six months then ended.



	Number of Shares		Weighted Average Grant Date Fair Value
Restricted stock awards outstanding at January 1, 2015	453,146		$	13.93
Restricted stock awards granted	69,744		17.04
Restrictions lapsing	(225,645	)	8.71
Restricted stock canceled	(14,544	)	19.29
Restricted stock awards at June 30, 2015	282,701		18.59