Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Schedule of Income Tax Expense, Difference in Income Tax Rate to Pretax Income) (Details)

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INCOME TAXES (Schedule of Income Tax Expense, Difference in Income Tax Rate to Pretax Income) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
INCOME TAXES [Abstract]      
Computed "expected" tax expense $ 31,636 $ 24,601 $ 16,538
Tax-exempt interest income, net (5,865) (5,181) (3,308)
Other, net (2,462) (1,295) (345)
Income tax expense $ 23,309 $ 18,125 $ 12,885