XML 113 R91.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation Plans (Details 1) (Restricted Stock, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	263,771	297,859	71,752
Weighted average market price	$ 44.82	$ 38.44	$ 38.43
Weighted average vesting period (years)	3 years 1 month 2 days	2 years 3 months 7 days	4 years 8 months 27 days

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References+ Details