BALANCE SHEET OFFSETTING (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross	$ 34,352	$ 45,358
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability	0	0
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed	34,352	45,358
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Not Offset, Policy Election Deduction	0	0
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash	(8,943)	(5,595)
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral	25,409	39,763
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross	33,684	51,252
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset	0	0
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned	33,684	51,252
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Offset, Policy Election Deduction	0	0
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash	33,684	51,252
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral	0	0
Securities Sold under Agreements to Repurchase, Gross	186,408	162,439
Securities Sold under Agreements to Repurchase, Asset	0	0
Securities Sold under Agreements to Repurchase	186,408	162,439
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities	186,408	162,439
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash	0	0
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	0	0
Customer Loan Swap Dealer Bank [Member]
Offsetting Assets [Line Items]
Derivative Liability, Fair Value, Gross Liability	25,164	39,627
Derivative Liability, Fair Value, Gross Asset	0	0
Fair Value	25,164	39,627
Derivative Liability, Not Offset, Policy Election Deduction	0	0
Derivative, Collateral, Right to Reclaim Cash	25,164	39,627
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Customer Loan Swaps Commercial Customer [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset	25,164	39,627
Derivative Asset, Fair Value, Gross Liability	0	0
Fair Value	25,164	39,627
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	25,164	39,627
Interest rate contracts
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset	9,188	5,731
Derivative Asset, Fair Value, Gross Liability	0	0
Fair Value	9,188	5,731
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Derivative, Collateral, Obligation to Return Cash	(8,943)	(5,595)
Derivative Asset, Fair Value, Amount Offset Against Collateral	245	136
Derivative Liability, Fair Value, Gross Liability	8,520	11,625
Derivative Liability, Fair Value, Gross Asset	0	0
Fair Value	8,520	11,625
Derivative Liability, Not Offset, Policy Election Deduction	0	0
Derivative, Collateral, Right to Reclaim Cash	8,520	11,625
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 0	$ 0