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v3.20.2

Debt:Term Loan (Details) - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2016 | Mar. 30, 2016
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Long-term Debt |  | $ 405,774 | $ 5,500 |  |
Term Loan Due 2026 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 75,000
Repayments of Long-term Debt | $ 45,000 |  |  | $ 30,000 |
Debt Instrument, Interest Rate During Period |  | 2.82% |  |  |
Debt Instrument, Interest Rate During Period With Patronage Credits |  | 1.80% |  |  |
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable interest rate |  | 1.875% |  |  |
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable interest rate |  | 2.125% |  |  |
Term Loan Due 2026 [Member] | Base Rate [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable interest rate |  | 0.875% |  |  |
Term Loan Due 2026 [Member] | Base Rate [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable interest rate |  | 1.125% |  |  |

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