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Loans - Unpaid Principal Balances by Delinquency Status (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, not past due | $ 6,996,039 |
Financing receivables, past due | 29,997 |
Nonaccrual loans | 122,072 | $ 87,781
Gross financing receivables | 7,148,108 |
Nonaccrual loans with no associated allowance | 24,000 |
Interest received on nonaccrual loans | 1,000 |
Farm & Ranch |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, not past due | 5,206,313 |
Financing receivables, past due | 29,997 |
Nonaccrual loans | 122,072 |
Gross financing receivables | 5,358,382 |
Rural Utilities |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, not past due | 1,789,726 |
Financing receivables, past due | 0 |
Nonaccrual loans | 0 |
Gross financing receivables | 1,789,726 |
30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 4,821 |
30-59 Days | Farm & Ranch |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 4,821 |
30-59 Days | Rural Utilities |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 0 |
60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 3,024 |
60-89 Days | Farm & Ranch |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 3,024 |
60-89 Days | Rural Utilities |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 0 |
90 Days and Greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 22,152 |
90 Days and Greater | Farm & Ranch |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | 22,152 |
90 Days and Greater | Rural Utilities |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivables, past due | $ 0 |

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