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v3.21.2

Loans - Activity in the Allowance for Credit Losses on Loans by Portfolio Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance |  |  | $ 263,177 |
Impact of adopting ASC 326 | $ 0 | $ 0 | 0 | $ 39,377
Ending balance | 255,288 |  | 255,288 |
Commercial Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 70,892 | 92,152 | 73,843 | 51,593
Impact of adopting ASC 326 |  |  |  | 21,263
Credit loss, expense (reversal) | (5,901) | 7,334 | (7,866) | 29,284
Charge-offs | (685) | (1,841) | (2,874) | (6,210)
Recoveries | 965 | 891 | 2,168 | 2,606
Net charge-offs | 280 | (950) | (706) | (3,604)
Ending balance | 65,271 | 98,536 | 65,271 | 98,536
Commercial and Industrial Total Energy Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 33,472 | 103,201 | 39,553 | 37,382
Impact of adopting ASC 326 |  |  |  | (10,453)
Credit loss, expense (reversal) | (5,527) | (27,342) | (11,328) | 82,664
Charge-offs | 0 | (35,042) | (1,433) | (68,842)
Recoveries | 65 | 0 | 1,218 | 66
Net charge-offs | 65 | (35,042) | (215) | (68,776)
Ending balance | 28,010 | 40,817 | 28,010 | 40,817
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 144,440 | 52,319 | 134,892 | 31,037
Impact of adopting ASC 326 |  |  |  | (13,519)
Credit loss, expense (reversal) | 3,654 | 44,587 | 12,576 | 79,348
Charge-offs | (137) | (3,511) | (137) | (3,584)
Recoveries | 36 | 30 | 662 | 143
Net charge-offs | (101) | (3,481) | 525 | (3,441)
Ending balance | 147,993 | 93,425 | 147,993 | 93,425
Total consumer real estate loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 5,636 | 8,170 | 7,926 | 4,113
Impact of adopting ASC 326 |  |  |  | 2,392
Credit loss, expense (reversal) | 611 | 352 | (2,111) | 1,922
Charge-offs | (388) | (135) | (672) | (420)
Recoveries | 295 | 611 | 1,011 | 991
Net charge-offs | (93) | 476 | 339 | 571
Ending balance | 6,154 | 8,998 | 6,154 | 8,998
Consumer Loan [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 6,818 | 8,039 | 6,963 | 8,042
Impact of adopting ASC 326 |  |  |  | (2,248)
Credit loss, expense (reversal) | 2,784 | 2,297 | 4,350 | 6,935
Charge-offs | (3,882) | (4,178) | (7,942) | (9,183)
Recoveries | 2,140 | 2,127 | 4,489 | 4,739
Net charge-offs | (1,742) | (2,051) | (3,453) | (4,444)
Ending balance | 7,860 | 8,285 | 7,860 | 8,285
Loans Receivable [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Beginning balance | 261,258 | 263,881 | 263,177 | 132,167
Impact of adopting ASC 326 |  |  |  | (2,565)
Credit loss, expense (reversal) | (4,379) | 27,228 | (4,379) | 200,153
Charge-offs | (5,092) | (44,707) | (13,058) | (88,239)
Recoveries | 3,501 | 3,659 | 9,548 | 8,545
Net charge-offs | (1,591) | (41,048) | (3,510) | (79,694)
Ending balance | $ 255,288 | $ 250,061 | $ 255,288 | $ 250,061

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