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Financing Arrangements (Details)	Jan. 27, 2025 USD ($) extension	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)
Financing Arrangements
Outstanding borrowings		$ 0	$ 0
Senior Unsecured Revolving Credit Facility | Line of credit
Financing Arrangements
Option to increase credit facility, additional amount	$ 250,000,000
Extension term	1 year
Number of term extensions | extension	2
Outstanding borrowings		0
Senior Unsecured Revolving Credit Facility | Line of credit | Minimum
Financing Arrangements
Basis spread on variable rate	0.00%
Senior Unsecured Revolving Credit Facility | Line of credit | Maximum
Financing Arrangements
Basis spread on variable rate	1.50%
Line of credit
Financing Arrangements
Maximum borrowing capacity		160,900,000	172,200,000
Outstanding bank guarantees		$ 11,700,000	$ 12,100,000
Revolving Credit Facility | Senior Unsecured Revolving Credit Facility | Line of credit
Financing Arrangements
Maximum borrowing capacity	$ 750,000,000
Letter of Credit | Senior Unsecured Revolving Credit Facility | Line of credit
Financing Arrangements
Maximum borrowing capacity	$ 100,000,000

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