XML 34 R36.htm IDEA: XBRL DOCUMENT

Share-Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Share Based Compensation (Textual) [Abstract]
Share-based compensation expense	$ 3.1	$ 2.5
Tax benefits	$ 1.1	$ 1.0
Vesting period for the 2012 SAR grant	3 years
Portion of an award vesting for the 2012 SAR grant	1/3 vesting after each year
Stock Appreciation Rights (SARs) [Member]
Additional Share Based Compensation (Textual) [Abstract]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, Grants in period	348,600
Restricted Stock [Member]
Additional Share Based Compensation (Textual) [Abstract]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, Grants in period	62,750
Performance Shares [Member]
Additional Share Based Compensation (Textual) [Abstract]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, Grants in period	76,780
Phantom Stock Units [Member]
Additional Share Based Compensation (Textual) [Abstract]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, Grants in period	5,186

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

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

+ References+ Details