COMMON EQUITY COMMON EQUITY (Details 1) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Reconciliation of shares outstanding
Common stock, shares issued	79,757,715	78,287,906
Deferred compensation rabbi trust (in shares)	467,967	385,439
Total common shares outstanding	79,289,748	77,902,467
Average cost of shares in the rabbi trust (in dollars per share)	$ 48.42	$ 46.03