Stock-Based Incentive Compensation Plans (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Stock options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	41,536	870,210
Performance Shares [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	15,815	294,758
Stock Appreciation Rights [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	0	80,225
Restricted Stock Units [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	82,004	686,230
Non-employee Agent Stock Options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	90	99,178
Non-employee Director Stock Options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	0	51,140
Non-employee Director Restricted Stock Units [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	12,218	22,346