ALLOWANCE FOR LOAN LOSSES (Change in Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	$ 70,395	$ 61,963	$ 55,686
Allowance for purchased credit deteriorated loans	12,313
Provision for credit losses	65,745	16,657	24,013
Recoveries on loans previously charged-off	3,804	5,365	3,549
Loans charged-off	(32,722)	(13,590)	(21,285)
Balance at end of year	$ 131,606	$ 70,395	$ 61,963