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LOANS AND ALLOWANCE FOR LOAN LOSSES - Narrative (Detail) | 12 Months Ended
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Dec. 31, 2020 USD ($) loan note | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 1,979,690,000 | $ 1,644,330,000 |
Maximum percentage of loan-to-value ratio upon loan origination (no more than) | 80.00% |  |
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral (no greater than) | 90.00% |  |
Interest income | $ 87,492,000 | 75,071,000 | $ 50,632,000
Period past due when loans are deemed impaired | 90 days |  |
Number of notes split | note | 2 |  |
Appraisals, required period interval | 18 months |  |
Minimum amount on which annual updated appraisals for criticized loans are required | $ 250,000 |  |
Percentage of strong loan-to-value | 70.00% |  |
Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 647,368,000 | 214,554,000 |
Commercial Real Estate | Owner-occupied |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 174,908,000 | 170,884,000 |
SBA | Payment Deferral | Minimum |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Fee income amortization period | 2 years |  |
SBA | Payment Deferral | Maximum |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Fee income amortization period | 5 years |  |
SBA | Commercial | Payment Deferral |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 15,700,000 |  |
Number of PPP loans | loan | 2,700 |  |
PPP loans generated amount | $ 409,100,000 |  |
SBA, loan guarantee, percentage | 100.00% |  |
PPP Loan processing fee income | $ 13,500,000 |  |
Interest income | $ 7,700,000 |  |
Loan deferral period | 180 days |  |
SBA | Consumer | Payment Deferral |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 2,500,000 |  |
Loan deferral period | 90 days |  |
SBA | Commercial and industrial | SBA PPP Loans |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans | $ 403,300,000 | $ 0 |
Unrecognized deferred fees | $ 5,800,000 |  |

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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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