CREDIT QUALITY ASSESSMENT (information on the credit quality of loan portfolio under the new CECL) (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	$ 38,632
Loans placed on non-accrual	2,400
Balance at end of period	51,374
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	8,450
Balance at end of period	10,834
Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	4,107
Balance at end of period	5,596
Commercial Real Estate Portfolio Segment | Commercial AD&C [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	829
Balance at end of period	829
Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	8,437
Balance at end of period	17,770
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	4,148
Balance at end of period	4,074
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	12,661
Balance at end of period	12,271
Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	0
Balance at end of period	0
Non-accrual status [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	38,632
Purchased credit deteriorated loans designated as Non-accrual	13,084
Loans placed on non-accrual	2,369
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(575)
Net payments or draws	(1,860)
Non-accrual loans brought current	(276)
Balance at end of period	51,374
Non-accrual status [Member] | Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	8,450
Purchased credit deteriorated loans designated as Non-accrual	2,539
Loans placed on non-accrual	1,001
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(175)
Net payments or draws	(981)
Non-accrual loans brought current	0
Balance at end of period	10,834
Non-accrual status [Member] | Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	4,107
Purchased credit deteriorated loans designated as Non-accrual	993
Loans placed on non-accrual	748
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(54)
Net payments or draws	(176)
Non-accrual loans brought current	(22)
Balance at end of period	5,596
Non-accrual status [Member] | Commercial Real Estate Portfolio Segment | Commercial AD&C [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	829
Purchased credit deteriorated loans designated as Non-accrual	0
Loans placed on non-accrual	0
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	0
Non-accrual loans brought current	0
Balance at end of period	829
Non-accrual status [Member] | Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	8,437
Purchased credit deteriorated loans designated as Non-accrual	9,544
Loans placed on non-accrual	0
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	(211)
Non-accrual loans brought current	0
Balance at end of period	17,770
Non-accrual status [Member] | Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	4,148
Purchased credit deteriorated loans designated as Non-accrual	0
Loans placed on non-accrual	0
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	(74)
Non-accrual loans brought current	0
Balance at end of period	4,074
Non-accrual status [Member] | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	12,661
Purchased credit deteriorated loans designated as Non-accrual	8
Loans placed on non-accrual	620
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(346)
Net payments or draws	(418)
Non-accrual loans brought current	(254)
Balance at end of period	12,271
Non-accrual status [Member] | Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	0
Purchased credit deteriorated loans designated as Non-accrual	0
Loans placed on non-accrual	0
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	0
Non-accrual loans brought current	0
Balance at end of period	$ 0