INCOME TAXES (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Tax at federal income tax rate									$ 36,836	$ 19,860	$ 19,672
Change resulting from:
Tax-exempt interest									(3,916)	(2,490)	(1,647)
Increase in cash value of bank owned life insurance									(607)	(484)	(568)
State income tax, net of federal benefit									695	667	304
Other									138	(1,656)	(279)
Provision for income taxes	$ 6,987	$ 10,364	$ 9,671	$ 6,124	$ 3,296	$ 7,368	$ 486	$ 4,747	$ 33,146	$ 15,897	$ 17,482