CREDIT QUALITY ASSESSMENT (Recorded Investment with Respect to Impaired loans, Associated Allowance by Applicable Portfolio Segment) (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	$ 15,333
Allowance	5,501
Impaired loans without a specific allowance	9,440
Impaired loans	24,773
Unpaid principal balance in total impaired loans	34,620
Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	12,652
Impaired loans without a specific allowance	4,188
Impaired loans	16,840
Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	266
Impaired loans without a specific allowance	2,370
Impaired loans	2,636
Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,415
Impaired loans without a specific allowance	2,882
Impaired loans	5,297
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	7,730
Allowance	3,817
Impaired loans without a specific allowance	1,137
Impaired loans	8,867
Unpaid principal balance in total impaired loans	11,296
Commercial [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	5,608
Impaired loans without a specific allowance	114
Impaired loans	5,722
Commercial [Member] | Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	266
Impaired loans without a specific allowance	151
Impaired loans	417
Commercial [Member] | Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,856
Impaired loans without a specific allowance	872
Impaired loans	2,728
All Other Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Allowance	0
Impaired loans without a specific allowance	1,717
Impaired loans	1,717
Unpaid principal balance in total impaired loans	2,618
All Other Loans | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	0
Impaired loans	0
All Other Loans | Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	1,444
Impaired loans	1,444
All Other Loans | Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	273
Impaired loans	273
Commercial Real Estate Portfolio Segment | Commercial AD&C [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	829
Allowance	132
Impaired loans without a specific allowance	0
Impaired loans	829
Unpaid principal balance in total impaired loans	829
Commercial Real Estate Portfolio Segment | Commercial AD&C [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	829
Impaired loans without a specific allowance	0
Impaired loans	829
Commercial Real Estate Portfolio Segment | Commercial AD&C [Member] | Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	0
Impaired loans	0
Commercial Real Estate Portfolio Segment | Commercial AD&C [Member] | Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	0
Impaired loans	0
Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	5,885
Allowance	1,529
Impaired loans without a specific allowance	3,327
Impaired loans	9,212
Unpaid principal balance in total impaired loans	13,805
Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	5,448
Impaired loans without a specific allowance	2,552
Impaired loans	8,000
Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member] | Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	775
Impaired loans	775
Commercial Real Estate Portfolio Segment | Commercial Investor RE [Member] | Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	437
Impaired loans without a specific allowance	0
Impaired loans	437
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	889
Allowance	23
Impaired loans without a specific allowance	3,259
Impaired loans	4,148
Unpaid principal balance in total impaired loans	6,072
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	767
Impaired loans without a specific allowance	1,522
Impaired loans	2,289
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member] | Restructured [Member] | Accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans without a specific allowance	0
Impaired loans	0
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied RE [Member] | Restructured [Member] | Non-accruing [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	122
Impaired loans without a specific allowance	1,737
Impaired loans	$ 1,859