XML 30 R47.htm IDEA: XBRL DOCUMENT v2.4.0.8
UNS ENERGY EARNINGS PER SHARE - Effects of Dilutive Common Stock on Weighted-Average Number of Shares (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Numerator:    
Net Income $ 15,475 $ 11,345
Weighted Average Shares of Common Stock Outstanding:    
Common Shares Issued 41,619 41,381
Fully Vested Deferred Stock Units 118 159
Total Weighted Average Shares of Common Stock Outstanding and Participating Securities - Basic 41,737 41,540
Effect of Dilutive Securities:    
Options and Stock Issuable Under Share-Based Compensation Plans 347 335
Total Shares - Diluted 42,084 41,875