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Indebtedness - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 15, 2021 | Dec. 13, 2019
Line of Credit Facility [Line Items] |  |  |
Revolving loan maximum borrowing capacity |  |  | $ 150,000
Weighted average interest rate on debt | 0.50% |  |
Debt issuance costs |  | $ 2,600 |
LIBOR | Minimum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, margin spread on LIBOR Rate | 1.25% |  |
LIBOR | Maximum |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt instrument, margin spread on LIBOR Rate | 3.25% |  |
Term loan |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving loan maximum borrowing capacity |  |  | 50,000
Revolving loan |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving loan maximum borrowing capacity |  | $ 200,000 | $ 100,000

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