Allowance for Credit Losses and Credit Quality Information - Rollforward of Allowance For Loan Losses (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||||||||||
| Beginning balance | $ 103,347,129 | $ 102,962,811 | $ 103,347,129 | $ 102,962,811 | $ 125,552,733 | ||||||
| Provision for credit losses | $ 36,822,000 | $ 51,423,000 | $ 49,841,000 | $ 50,516,000 | $ 33,024,000 | $ 44,103,000 | $ 46,669,000 | $ 45,419,000 | 188,602,351 | 169,215,395 | 156,973,220 |
| Charge-offs | (198,013,481) | (190,796,232) | (210,544,759) | ||||||||
| Recoveries | 18,111,279 | 21,965,155 | 30,981,617 | ||||||||
| Net charge-off | (179,902,202) | (168,831,077) | (179,563,142) | ||||||||
| Ending balance | $ 112,047,278 | $ 103,347,129 | 112,047,278 | 103,347,129 | 102,962,811 | ||||||
| Charge offs | $ 8,200,000 | 12,000,000.0 | 19,300,000 | ||||||||
| Proceeds from prior write offs, prior periods | 1,500,000 | 5,700,000 | |||||||||
| Proceeds from prior write offs, current period | $ 10,500,000 | $ 13,600,000 | |||||||||
| X | ||||||||||
- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash inflow from recovery of accounts receivable previously written off. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Proceeds, Accounts Receivable, Previously Written Off, Current Period No definition available.
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- Definition Proceeds, Accounts Receivable, Previously Written Off, Recovery, Prior Periods No definition available.
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