| 
           REGULATORY MATTERS - Additional Information (Detail) (USD $) 
        In Millions, unless otherwise specified  | 
        
           Dec. 31, 2012 
         | 
      
|---|---|
| Cumulative Dividends | $ 90.1 | 
| X | ||||||||||
| 
             
- Definition 
          Amount of cumulative cash dividends distributed to shareholders. No definition available. 
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