CREDIT QUALITY ASSESSMENT (information on the credit quality of loan portfolio under the new CECL) (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	$ 38,632
Loans placed on non-accrual	29,700
Balance at end of period	75,938
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	8,450
Balance at end of period	20,246
Consumer [Member]
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	4,107
Balance at end of period	7,800
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	2,957
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	26,482
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	6,729
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable, Nonaccrual [Line Items]
Balance at beginning of period	12,661
Balance at end of period	11,724
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	29,658
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(737)
Net payments or draws	(3,741)
Non-accrual loans brought current	(958)
Balance at end of period	75,938
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	10,988
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(335)
Net payments or draws	(1,396)
Non-accrual loans brought current	0
Balance at end of period	20,246
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	3,248
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(56)
Net payments or draws	(392)
Non-accrual loans brought current	(100)
Balance at end of period	7,800
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	2,128
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	2,957
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	8,974
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	(473)
Non-accrual loans brought current	0
Balance at end of period	26,482
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	3,426
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	0
Net payments or draws	(845)
Non-accrual loans brought current	0
Balance at end of period	6,729
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	894
Non-accrual balances transferred to OREO	0
Non-accrual balances charged-off	(346)
Net payments or draws	(635)
Non-accrual loans brought current	(858)
Balance at end of period	11,724
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