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PARENT COMPANY AND REGULATORY RESTRICTIONS (Details 4) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Expense:                      
Interest on long-term debt                 $ 3,701 $ 8,815 $ 20,135
Net income (loss) 12,410 10,721 10,812 13,478 12,095 11,626 8,211 4,639 47,421 36,571 (250,953)
Parent company
                      
Interest income:                      
Interest and dividends on investment securities                     11
Interest from subsidiary banks                 48 109 12
Other income                 9 1,047 107
Total income                 57 1,156 130
Expense:                      
Interest on long-term debt                 3,687 3,392 3,324
Other expenses                 3,081 3,584 6,039
Total expenses                 6,768 6,976 9,363
Loss before income taxes and equity in undistributed income (loss) of subsidiaries                 (6,711) (5,820) (9,233)
Loss before equity in undistributed income (loss) of subsidiaries                 (6,711) (5,820) (9,233)
Equity in undistributed income (loss) of subsidiary banks                 54,124 42,377 (241,720)
Equity in undistributed income of other subsidiaries                 8 14  
Net income (loss)                 $ 47,421 $ 36,571 $ (250,953)