Loans and Allowance for Credit Losses - Schedule of Loan Delinquency for Recreation and Home Improvement Loans (Detail) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|---|---|---|---|
| Recreation [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | $ 135,820 | |||||||
| 2025 | 421,853 | $ 435,498 | ||||||
| 2024 | 337,563 | 356,392 | ||||||
| 2023 | 241,297 | 256,680 | ||||||
| 2022 | 212,970 | 227,028 | ||||||
| 2021 | 142,693 | |||||||
| Prior | 265,346 | 143,810 | ||||||
| Total | 1,614,849 | [1] | 1,562,101 | [2] | ||||
| Recreation [Member] | Current | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 135,621 | |||||||
| 2025 | 407,944 | 423,427 | ||||||
| 2024 | 320,422 | 335,079 | ||||||
| 2023 | 226,540 | 237,917 | ||||||
| 2022 | 199,919 | 209,204 | ||||||
| 2021 | 132,704 | |||||||
| Prior | 245,813 | 131,113 | ||||||
| Total | 1,536,259 | [1] | 1,469,444 | [2] | ||||
| Recreation [Member] | 30-59 [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 199 | |||||||
| 2025 | 8,997 | 8,210 | ||||||
| 2024 | 11,036 | 12,763 | ||||||
| 2023 | 9,563 | 11,042 | ||||||
| 2022 | 8,463 | 10,623 | ||||||
| 2021 | 6,061 | |||||||
| Prior | 13,443 | 8,212 | ||||||
| Total | 51,701 | [1] | 56,911 | [2] | ||||
| Recreation [Member] | 60-89 [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 0 | |||||||
| 2025 | 3,419 | 2,374 | ||||||
| 2024 | 3,824 | 5,414 | ||||||
| 2023 | 3,522 | 4,918 | ||||||
| 2022 | 2,994 | 4,872 | ||||||
| 2021 | 2,581 | |||||||
| Prior | 3,934 | 2,731 | ||||||
| Total | 17,693 | [1] | 22,890 | [2] | ||||
| Recreation [Member] | 90+ [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 0 | |||||||
| 2025 | 1,493 | 1,487 | ||||||
| 2024 | 2,281 | 3,136 | ||||||
| 2023 | 1,672 | 2,803 | ||||||
| 2022 | 1,594 | 2,329 | ||||||
| 2021 | 1,347 | |||||||
| Prior | 2,156 | 1,754 | ||||||
| Total | 9,196 | [1] | 12,856 | [2] | ||||
| Home Improvement [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 62,623 | |||||||
| 2025 | 176,371 | 194,852 | ||||||
| 2024 | 160,738 | 174,886 | ||||||
| 2023 | 145,000 | 154,104 | ||||||
| 2022 | 145,128 | 153,027 | ||||||
| 2021 | 72,566 | |||||||
| Prior | 127,283 | 63,750 | ||||||
| Total | 817,143 | [1] | 813,185 | [2] | ||||
| Home Improvement [Member] | Current | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 62,530 | |||||||
| 2025 | 175,485 | 193,964 | ||||||
| 2024 | 159,242 | 172,735 | ||||||
| 2023 | 142,930 | 151,637 | ||||||
| 2022 | 143,278 | 151,365 | ||||||
| 2021 | 71,812 | |||||||
| Prior | 125,876 | 63,114 | ||||||
| Total | 809,341 | [1] | 804,627 | [2] | ||||
| Home Improvement [Member] | 30-59 [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 93 | |||||||
| 2025 | 591 | 535 | ||||||
| 2024 | 649 | 980 | ||||||
| 2023 | 1,111 | 1,609 | ||||||
| 2022 | 1,191 | 876 | ||||||
| 2021 | 513 | |||||||
| Prior | 951 | 378 | ||||||
| Total | 4,586 | [1] | 4,891 | [2] | ||||
| Home Improvement [Member] | 60-89 [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 0 | |||||||
| 2025 | 191 | 353 | ||||||
| 2024 | 478 | 761 | ||||||
| 2023 | 600 | 441 | ||||||
| 2022 | 328 | 455 | ||||||
| 2021 | 199 | |||||||
| Prior | 223 | 158 | ||||||
| Total | 1,820 | [1] | 2,367 | [2] | ||||
| Home Improvement [Member] | 90+ [Member] | ||||||||
| Financing Receivable, Past Due [Line Items] | ||||||||
| 2026 | 0 | |||||||
| 2025 | 104 | 0 | ||||||
| 2024 | 369 | 410 | ||||||
| 2023 | 359 | 417 | ||||||
| 2022 | 331 | 331 | ||||||
| 2021 | 42 | |||||||
| Prior | 233 | 100 | ||||||
| Total | $ 1,396 | [1] | $ 1,300 | [2] | ||||
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