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