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Derivative instruments and hedging activities - Balance Sheet (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Jul. 31, 2024
Derivative instruments and hedging activities
Gain (loss) recognized due to ineffectiveness	$ 0	$ 0
Total Asset Derivatives	3,889		$ 6,519
Total Liability Derivatives	2,426		4,460
Prepaid expenses and other current assets
Derivative instruments and hedging activities
Commodity derivatives propane swap assets	3,774		5,925
Other current liabilities
Derivative instruments and hedging activities
Commodity derivatives propane swap liabilities	1,701		4,379
Other assets, net
Derivative instruments and hedging activities
Commodity derivatives propane swap assets	115		594
Other liabilities
Derivative instruments and hedging activities
Commodity derivatives propane swap liabilities	$ 725		$ 81