INCOME TAXES (Schedule of Income Tax Expense, Difference in Income Tax Rate to Pretax Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Net [Abstract]
Computed expected tax expense	$ 48,564	$ 37,680	$ 36,738
Tax-exempt interest income, net	(8,259)	(5,188)	(6,112)
Valuation allowance adjustment	0	0	(2,982)
Impact of the Tax Act	0	0	6,105
State income tax benefit	(1,078)	(1,133)	0
Other, net	(1,670)	(1,343)	(959)
Income tax expense	$ 37,557	$ 30,016	$ 32,790