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LOANS AND ALLOWANCE FOR LOAN LOSSES - Composition of Nonaccrual Loans and Leases (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | $ 28,499 | $ 21,585
NTM Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 1,113 | 0
Traditional Loans and Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 27,386 | 21,585
Commercial | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 5,716 | 5,455
Commercial | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 3,440 | 2,574
Commercial | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 2,519 | 0
Commercial | NTM Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | NTM Loans | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | NTM Loans | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | NTM Loans | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | Traditional Loans and Leases | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 5,716 | 5,455
Commercial | Traditional Loans and Leases | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Commercial | Traditional Loans and Leases | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 3,440 | 2,574
Commercial | Traditional Loans and Leases | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 2,519 | 0
Consumer | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 15,949 | 12,929
Consumer | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 875 | 627
Consumer | NTM Loans | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 1,113 | 0
Consumer | NTM Loans | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 0 | 0
Consumer | Traditional Loans and Leases | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | 14,836 | 12,929
Consumer | Traditional Loans and Leases | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Total non-accrual loans | $ 875 | $ 627

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