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Loans - Non-Accrual Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | $ 48,966 | $ 53,713
Non-accrual with no credit loss allowance | 30,749 | 27,202
Commercial Portfolio Segment [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 16,693 | 22,582
Non-accrual with no credit loss allowance | 6,135 | 4,701
Commercial and Industrial Total Energy Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 12,271 | 14,433
Non-accrual with no credit loss allowance | 6,912 | 8,533
Paycheck Protection Program [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 0 | 0
Non-accrual with no credit loss allowance | 0 | 0
Commercial Real Estate Buildings Land And Other Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 19,003 | 15,297
Non-accrual with no credit loss allowance | 17,005 | 13,817
Construction Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 583 | 948
Non-accrual with no credit loss allowance | 583 | 0
Total consumer real estate loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 416 | 440
Non-accrual with no credit loss allowance | 114 | 138
Consumer Loan [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 0 | 13
Non-accrual with no credit loss allowance | $ 0 | $ 13

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- Definition Amount of financing receivable on nonaccrual status with no allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 + Details
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