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PARENT COMPANY AND REGULATORY RESTRICTIONS (Details 3)
Dec. 31, 2012
Dec. 31, 2011
Condensed Balance Sheets (Parenthetical)    
Common stock, authorized shares 185,000,000 185,000,000
Common stock, issued shares 41,867,046 41,749,116
Common stock, outstanding shares 41,867,046 41,749,116
Parent company
    
Condensed Balance Sheets (Parenthetical)    
Common stock, authorized shares 185,000,000 185,000,000
Common stock, issued shares 41,867,046 41,749,116
Common stock, outstanding shares 41,867,046 41,749,116