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INCOME TAXES (Details 3) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2010
Federal
Dec. 31, 2011
Federal
Dec. 31, 2011
State
Y
Dec. 31, 2010
State
Dec. 31, 2007
State
Operating loss carryforwards                
Section 597 gain related to the UCB acquisition       $ 666,000,000        
Net operating loss carryforwards       3,300,000 3,000,000 312,300,000 321,100,000  
Net operating loss from the acquisition of Desert Community Bank (DCB) in 2007               3,000,000
Carryforward period of net operating losses (in years)           20    
Activity related to unrecognized tax benefits                
Balance, beginning of year 4,952,000 5,763,000            
Additions for tax positions of prior years 794,000 721,000            
Reductions for tax positions of prior years (3,208,000) (288,000)            
Additions for tax positions of current year 794,000 634,000            
Settlements   (1,878,000)            
Balance, end of year 3,332,000 4,952,000            
Increase in unrecognized tax benefits reserve for the California enterprise zone net interest deduction 1,600,000              
Reduction in unrecognized tax benefits reserve for California enterprise zone, net interest deduction 3,200,000              
ASC 740-10 liability 4,800,000 6,200,000            
Total amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate 2,200,000 3,000,000            
Accrued interest and penalties expense for unrecognized tax positions 287,000 796,000 1,150,000          
Total interest and penalties accrued $ 1,500,000 $ 1,200,000