XML 46 R61.htm IDEA: XBRL DOCUMENT

Stock Incentive Plans Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense	$ 17.6	$ 12.8	$ 5.9
Deferred Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation, Obligation to Issue (in Shares)	31,528
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 20.9
Unrecognized compensation expense, Weighted average recognition period (in Years)	2
Phantom Stock \| Deferred Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation, Issued (in Shares)			149,203

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details

- Definition

The number of shares issued pursuant to the terms of the deferred compensation plan as of the balance sheet date.

+ References+ Details