CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Net Income (Loss)	$ (24,471)	$ (59,660)	$ 39,291
Net income (loss) attributable to noncontrolling interest	0	0	(155)
Net income (loss)	(24,471)	(59,660)	39,136
Unrecognized loss on cash flow hedges:
Net change in other comprehensive income (loss), net of tax, attributable to Matthews shareholders	90,732	5,662	15,787
Net change in other comprehensive income (loss), net of tax, attributable to noncontrolling interest	0	23	11
Net current-period OCI	90,732	5,685	15,798
Comprehensive income (loss) attributable to Matthews shareholders	66,261	(53,998)	55,078
Comprehensive income (loss) attributable to noncontrolling interest	0	23	(144)
Total comprehensive income	66,261	(53,975)	54,934
Foreign Currency Translation Adjustment
Unrecognized loss on cash flow hedges:
Net current-period OCI	89,626	15,596	13,125
Foreign Currency Translation Adjustment, Matthews
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	(9,095)	16,182	13,979
Net amount reclassified to earnings	98,721	(609)	(865)
Net change in other comprehensive income (loss), net of tax, attributable to Matthews shareholders	89,626	15,573	13,114
Net current-period OCI	89,626	15,573	13,114
Foreign Currency Translation Adjustment, Noncontrolling Interest
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	0	23	11
Net change in other comprehensive income (loss), net of tax, attributable to noncontrolling interest	0	23	11
Net current-period OCI	0	23	11
Pension Plans and Other Postretirement Benefits
Unrecognized loss on cash flow hedges:
Net current-period OCI	2,585	(1,805)	1,578
Pension Plans and Other Postretirement Benefits, Matthews
Unrecognized loss on cash flow hedges:
Net change in other comprehensive income (loss), net of tax, attributable to Matthews shareholders	2,585	(1,805)	1,578
Pension Plans and Other Postretirement Benefits, Noncontrolling Interest
Unrecognized loss on cash flow hedges:
Net change in other comprehensive income (loss), net of tax, attributable to noncontrolling interest	0	0	0
Net Investment Gain (Loss), Including Noncontrolling Interest
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	(505)	(6,104)	3,056
Net amount reclassified to earnings	(974)	(2,002)	(1,961)
Net Investment Gain (Loss), Matthews
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	(505)	(6,104)	3,056
Net amount reclassified to earnings	(974)	(2,002)	(1,961)
Net Investment Gain (Loss), Noncontrolling Interest
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	0	0	0
Net amount reclassified to earnings	0	0	0
Gain (Loss), Net, Derivatives
Unrecognized loss on cash flow hedges:
Net current-period OCI	(1,479)	(8,106)	1,095
Fair value of cash flow hedges
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	(505)	(6,104)	3,056
Net amount reclassified to earnings	(974)	(2,002)	(1,961)
Net change in other comprehensive income (loss), net of tax, attributable to Matthews shareholders	(1,479)	(8,106)	1,095
Net current-period OCI	(1,479)	(8,106)	1,095
Gain (Loss), Net, Derivatives, Noncontrolling Interest
Unrecognized loss on cash flow hedges:
Net change from periodic revaluation	0	0	0
Net change in other comprehensive income (loss), net of tax, attributable to noncontrolling interest	0	0	0
Net current-period OCI	$ 0	$ 0	$ 0

MATTHEWS INTERNATIONAL CORP 10-K