Stockholders' Equity and Compensation Arrangements Share - Based Compensation Activity (Tables)

3 Months Ended

Mar. 31, 2015

Share - Based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The table below summarizes the stock option activity for the three months ended March 31, 2015:

	Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands) (1)
Outstanding at December 31, 2014	2,262,994		$	1.09	5.03	$	16,226
Exercised	(184,626	)	$	0.66
Forfeited	(876	)	$	2.48
Outstanding at March 31, 2015	2,077,492		$	1.13	4.80	$	12,631
Exercisable at March 31, 2015	2,077,492		$	1.13	4.80	$	12,631

(1) The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of March 31, 2015 and December 31, 2014, respectively.

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The table below summarizes activity regarding unvested restricted stock units under the Plans for the three months ended March 31, 2015:

	Restricted Stock Units		Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2014	41,337,927		$	7.78
Granted	2,235,833		$	7.48
Vested	(6,101,202	)	$	8.02
Forfeited	(1,983,289	)	$	8.11
Unvested at March 31, 2015	35,489,269		$	7.70

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

The table below summarizes activity regarding unvested performance share units for the three months ended March 31, 2015:    

	Performance Share Units		Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2014	1,015,844		$	8.07
Granted	—		$	—
Vested	—		$	—
Forfeited	(111,287	)	$	8.07
Unvested at March 31, 2015	904,557		$	8.07

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

The table below summarizes activity regarding unvested restricted stock for the three months ended March 31, 2015:

	Restricted Stock Awards		Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2014	34,067		$	15.53
Granted	984,843		$	7.42
Vested	(1,591	)	$	17.07
Forfeited	—		$	—
Unvested at March 31, 2015	1,017,319		$	7.56