Shareholders' Equity and Stock-Based Compensation Plans Narrative (Details)	12 Months Ended	0 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2011 Directors' Plan [Member]	Jun. 30, 2011 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Dec. 31, 2011 Employee Stock Option [Member]	Jan. 31, 2009 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2010 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options and restricted stock maximum vesting period in years	1 year		3 years	10 years		3 years
Shares reserved for future grants under the stock option and compensation plan	489,000			12,400,000
Stock options granted under the stock option and compensation plan					485,000	616,686	578,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		11,000	352,091
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year		3 years	10 years		3 years