Senior Notes (Tables)

12 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Principal Amounts Carrying amounts and Fair Values of Senior Notes

The following table presents the face values and fair values for the Senior Notes at September 30, 2022 and 2021: 

	September 30, 2022				September 30, 2021
	Face Value (*)		Fair Value		Face Value (*)		Fair Value
	(In thousands)
The 2018 Senior Notes	$	400,000	$	381,500	$	400,000	$	453,000
The 2019 Senior Notes and the 2021 Senior Notes	900,000		767,250		350,000		357,000
Total	$	1,300,000	$	1,148,750	$	750,000	$	810,000

(*) The carrying value of the Senior Notes was the face value reduced by the net debt issuance costs of $14.3 million and $9.0 million at September 30, 2022 and 2021, respectively.

Future Principal Payments For the Senior Notes

Future principal payments for the Senior Notes are as follows:

Year Ending September 30,	(In thousands)
2026	400,000
2027	—
Thereafter	900,000
Total	$	1,300,000