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INCOME TAXES (Schedule of Total Income Tax Expense Differed from Amounts Computed by Applying US Federal Income Tax Rate to Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Computed “expected” tax expense									$ 12,121	$ 19,008	$ 14,959
(Decrease)/increase in taxes resulting from:
Tax-exempt income									(402)	(584)	(496)
State income taxes									2,942	1,514	1,671
Bank owned life insurance income									(290)	(475)	(492)
Life insurance expense									148	479	297
Gain on death benefit									(630)
Interest disallowance									115	124	95
Meals and entertainment expense									25	76	77
Stock-based compensation									(481)	(982)	15
Tax reform impact										(1,648)
Other									2	298	138
Total income tax expense	$ 2,887	$ 3,617	$ 3,832	$ 3,214	$ 2,922	$ 6,256	$ 4,908	$ 3,724	$ 13,550	$ 17,810	$ 16,264

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