Derivative Instruments (Tables)

6 Months Ended

Mar. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

The notional values of the Company’s outstanding interest rate swap contracts were as follows:

	March 31, 2022		September 30, 2021
	(dollars in thousands)
Interest rate swap contracts	$	1,220,000	$	1,220,000

The notional values of the Company’s outstanding foreign currency forward contracts were as follows:

	March 31, 2022		September 30, 2021
	(dollars in thousands)
Foreign currency forward contracts	$	—	$	28,254

Summary of Derivative Instruments, Gain (Loss)

For derivatives designated as cash flow hedges, the gain (loss) recognized in Other comprehensive (loss) income was:

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
	(dollars in thousands)
Interest rate swap contracts	$	25,839	$	17,246	$	28,719	$	18,465
Foreign currency forward contracts	—		(27)		—		(117)
Total gain recognized	$	25,839	$	17,219	$	28,719	$	18,348

The Company recorded a corresponding (gain) loss on the change in fair market value as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
	(dollars in thousands)
Commodity index contracts	$	(1,710)	$	(1,788)	$	(1,489)	$	(5,591)

Schedule of Derivatives Designated as Cash Flow Hedges

For derivatives designated as cash flow hedges, the gain (loss) reclassified from Accumulated other comprehensive (loss) income into the condensed consolidated statements of operations was:

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
	(dollars in thousands)
Interest rate swap contracts	$	2,287	$	(7,561)	$	4,960	$	(5,113)
Foreign currency forward contracts	—		(264)		—		(132)
Total gain recognized	$	2,287	$	(7,825)	$	4,960	$	(5,245)

Schedule of Foreign Exchange Contracts, Statement of Financial Position

For derivatives de-designated as cash flow hedges and economic hedges on foreign currency denominated receivables, the (gain) loss recognized directly into Foreign currency loss (gain) in the condensed consolidated statements of operations was:

	Three Months Ended March 31,				Six Months Ended March 31,
	2022		2021		2022		2021
	(dollars in thousands)
Foreign currency forward contracts	$	—	$	(590)	$	(320)	$	917

The notional values of the Company’s outstanding commodity index contracts were as follows:

	March 31, 2022	September 30, 2021
	(volumes in pounds)
Aluminum index contracts	—	7,200,000
Steel index contracts	14,600,000	700,000