| Schedule of Interest Rate Swap Contracts Reflected in Consolidated Balance Sheets | 
At June 30, 2025 and September 30, 2024, derivative instruments were reflected on a gross-basis in the Consolidated Balance Sheets as follows:
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| Derivatives: | 
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June 30, 2025 | 
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September 30, 2024 | 
 
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Interest Rate Swaps | 
Cross-Currency Swaps | 
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Interest Rate Swaps | 
Cross-Currency Swaps | 
 
| Current assets: | 
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| Other current assets | 
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$ | 
42  | 
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$ | 
—  | 
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$ | 
—  | 
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$ | 
—  | 
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| Long-term assets: | 
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  | 
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  | 
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| Other non-current assets | 
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73  | 
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—  | 
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—  | 
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—  | 
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| Current liabilities: | 
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| Other current liabilities | 
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(870) | 
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(21,006) | 
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(863) | 
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(18,042) | 
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| Long-term liabilities: | 
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  | 
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| Other non-current liabilities | 
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(1,454) | 
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(38,711) | 
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(1,743) | 
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(48,925) | 
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Total derivatives(1)
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$ | 
(2,209) | 
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$ | 
(59,717) | 
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$ | 
(2,606) | 
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$ | 
(66,967) | 
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(1) Cross-currency swap amounts at June 30, 2025 and September 30, 2024 reflect $40,186 and $58,432 of partial advanced payments received from the counterparties to certain swap contracts, respectively (see below).
 
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| Schedule of Interest Rate Contracts | 
 The following table presents information related to interest rate swaps entered into by the Company and designated as cash flow hedges: 
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June 30, 2025 | 
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September 30, 2024 | 
 
| Notional amount | 
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$ | 
225,000  | 
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$ | 
175,000  | 
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| Weighted-average maturity period (years) | 
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2.9 | 
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3.2 | 
 
| Weighted-average received rate | 
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4.33  | 
% | 
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4.85  | 
% | 
 
| Weighted-average pay rate | 
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3.80  | 
% | 
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3.83  | 
% | 
 
  The following table presents information related to cross currency swaps entered into by the Company and designated as net investment hedges:
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Notional Amount | 
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Unrealized Gains (Losses)  Recognized in AOCI | 
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| Swap Currencies | 
Maturity Date | 
June 30, 2025 | 
September 30, 2024 | 
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June 30, 2025 | 
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September 30, 2024 | 
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| USD/EUR | 
September 2027 | 
$ | 
81,392  | 
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$ | 
81,392  | 
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$ | 
(5,786) | 
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$ | 
(5,440) | 
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| USD/SEK | 
June 2026 | 
20,000  | 
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20,000  | 
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(2,683) | 
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(468) | 
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| USD/SGD | 
August 2026 | 
—  | 
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20,000  | 
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—  | 
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(441) | 
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| USD/EUR | 
August 2026 | 
25,000  | 
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25,000  | 
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(4,878) | 
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(30) | 
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| USD/CAD | 
May 2025 | 
—  | 
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—  | 
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—  | 
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—  | 
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$ | 
126,392  | 
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$ | 
146,392  | 
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$ | 
(13,347) | 
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(1)  | 
$ | 
(6,379) | 
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(1)  | 
 
 
(1) Total unrealized gains (losses) are presented net of tax of $4,506 and $2,156 as of June 30, 2025 and September 30, 2024, respectively.
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