Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summarized information about stock options outstanding

Summarized information about stock options outstanding at December 31, 2015 under the 2003 Plan and the 2012 Incentive Plan is as follows.



	Number of options (in thousands)		Weighted average exercise price
Options outstanding at December 31, 2014	1,798		$	12.47
Options granted	797		$	22.32
Options exercised	(85	)	$	9.32
Options forfeited	(147	)	$	20.55
Options outstanding at December 31, 2015	2,363		$	15.40

Summarized information about outstanding and exercisable stock option



	Options outstanding at December 31, 2015				Options exercisable at December 31, 2015
Range of exercise prices	Shares outstanding (in thousands)	Weighted average remaining contractual life	Weighted average exercise price		Shares exercisable (in thousands)	Weighted average exercise price
$8.18 - $9.90	848	2.31	$	8.33	432	$	8.41
$10.39 - $17.80	394	1.35	$	10.64	197	$	10.64
$18.77 - $22.66	837	3.95	$	21.83	5	$	18.77
$23.40 - $27.33	284	3.26	$	24.22	—	$	—

Summary of the non-vested restricted stock and restricted stock units

A summary of the non-vested restricted stock and restricted stock units as of December 31, 2015 is presented below (in thousands, except fair value).



	Restricted Stock								Restricted Stock Units
	Service Based				Performance Based				Service Based				Performance Based
Non-vested restricted stock and restricted stock units	Shares		Weighted average fair value		Shares		Weighted average fair value⁽¹⁾		Shares		Weighted average fair value		Shares		Weighted average fair value⁽¹⁾
Non-vested at December 31, 2014	569		$	14.03	97		$	13.24	71		$	16.28	97		$	—
Granted	430		$	22.51	—		—		36		$	24.58	—		—
Vested	(8	)	$	15.03	(97	)	—		(39	)	$	14.02	(97	)	—
Forfeited	(137	)	$	18.08	—		—		—		—		—		—
Non-vested at December 31, 2015	854		$	17.64	—		$	13.24	68		$	21.89	—		$	—

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(1)	The fair value of these restricted stock units is reflected in the fair value of the performance based restricted stock, which was estimated based on the most likely outcome of the award as determined by the Monte Carlo method.

2003 Stock and Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Weighted average assumptions used to estimate fair value of stock options granted under the Stock and Incentive Plan

The fair value of stock option awards outstanding under the 2003 Plan was estimated using the following weighted average assumptions at December 31, 2015, 2014 and 2013.



	2015	2014	2013
Stock option pricing model	Black Scholes Merton	Black Scholes Merton	Black Scholes Merton
Expected option life	0.39 years	1.51 years	2.44 years
Risk-free interest rate	0.64%	0.74%	0.69%
Volatility	91.98%	55.14%	51.51%
Dividend yield	—%	—%	—%
Estimated forfeiture rate	—%	—%	0.79%

2012 Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Weighted average assumptions used to estimate fair value of stock options granted under the Stock and Incentive Plan

The weighted average grant date fair value for stock option awards outstanding under the 2012 Incentive Plan was estimated using the following weighted average assumptions during the years ended December 31, 2015, 2014 and 2013.



	2015	2014	2013
Stock option pricing model	Black Scholes Merton	Black Scholes Merton	Black Scholes Merton
Expected option life	4.00 years	3.99 years	4.00 years
Risk-free interest rate	1.15%	1.21%	0.69%
Volatility	56.89%	51.47%	58.65%
Dividend yield	—%	—%	—%
Estimated forfeiture rate	3.21%	4.28%	6.37%
Weighted average fair value of stock option awards granted during the year	$9.90	$9.45	$3.91