Stock-Based Compensation Narrative (Details)	3 Months Ended
	Jun. 30, 2012	Mar. 31, 2012
Directors' Plan [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
Shares reserved for future grants under the stock option and compensation plan		490,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	21,000
Employee Stock Option [Member]
Statement [Line Items]
Shares reserved for future grants under the stock option and compensation plan		12,600,000
Stock Options [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Stock options granted under the stock option and compensation plan	471,000
Restricted Stock [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	312,000