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INCOME TAXES (Computation of Differences Between Financial Statement Tax Expense And Amounts) (Details) (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
Income taxes at statutory federal rate of 35%                 $ 18,402 $ 15,883 $ 12,873
Tax exempt income                 (1,122) (1,376) (958)
Nondeductible expense                 182 213 209
State income tax, net of federal tax effect                 554 490 616
Net operating loss                 0 0 (30)
Tax credits                 (253) (153) (127)
Bank owned life insurance                 (340) (348) (408)
Reserve for unrecognized tax benefits                 (45) 22 22
Other                 (196) (13) 40
Total income tax expense $ 3,808 $ 4,740 $ 4,392 $ 4,242 $ 3,672 $ 4,418 $ 4,001 $ 2,627 $ 17,182 $ 14,718 $ 12,237