ACQUISITIONS (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Island Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Net interest income after provision for loan losses	$ 258,017	$ 227,429
Net income	90,025	78,150
MNB Bancorp [Member]
Business Acquisition [Line Items]
Net interest income after provision for loan losses	304,049	267,104
Net income	$ 129,797	$ 88,518