Stockholders' Equity - Restricted Stock Units (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended		1 Months Ended					3 Months Ended		1 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Restricted Stock Units (RSUs)	Nov. 30, 2013 Performance Based RSU Officer	Jun. 30, 2014 Performance Based RSU Officer	Nov. 30, 2013 Performance-Based MSU	Nov. 30, 2013 Performance-Based MSU Minimum	Nov. 30, 2013 Performance-Based MSU Maximum	May 31, 2013 Performance-Based MSU First Vesting Period	May 31, 2013 Performance-Based MSU Second Vesting Period	Jun. 30, 2014 1992 Plan Restricted Stock Units (RSUs) quarter	Jun. 30, 2014 2011 Equity Incentive Plan Restricted Stock Units (RSUs) quarter	May 31, 2014 FY2015 Short Term Plan Minimum	May 31, 2014 FY2015 Short Term Plan Maximum
Class of Stock [Line Items]
Nonvested restricted units outstanding		4,276,000		300,000
Vesting period, in years										4 years	4 years
Vested in first period of employment										0	0
Award vesting period, quarters										12	12
Restricted stock units awarded		1,887,000	500,000
Restricted stock units vested		544,000	200,000
Grants in period, fair value			$ 3.3		$ 3.9
Award performance period								2 years	3 years
Award vesting percentage						0.00%	150.00%
Award pay out percentage												50.00%	150.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Shares, Beginning balance		6,105,000		300,000
Number of Shares, Awarded		1,887,000	500,000
Number of Shares, Vested		(544,000)	(200,000)
Number of Shares, Cancelled		(3,172,000)
Number of Shares, Ending balance		4,276,000		300,000
Weighted average remaining contractual term for the restricted stock units outstanding, in years	1 year 4 months 12 days
Aggregate pre-tax intrinsic value of restricted stock units outstanding which includes performance based awards which are subject to milestone attainments	46.2
Common stock, closing price per share	$ 10.81
Aggregate pretax intrinsic value	$ 4.7