FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair value of financial instruments

The following table presents financial instruments, other than debt, that we measured at fair value on a recurring basis at March 31, 2020 and September 30, 2019.  See Note 10 of this Report on Form 10-Q for a detailed discussion of our debt. We have classified the following assets and liabilities in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest-level input that is significant to the determination of the fair value. 

March 31, 2020	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	340,702	$	—	$	—	$	340,702
Other long-term investments	1,036		—		—		1,036
Total assets	$	341,738	$	—	$	—	$	341,738
Liabilities:
Derivative financial instruments	—		41,452		—		41,452
Total liabilities	$	—	$	41,452	$	—	$	41,452

September 30, 2019	Level 1		Level 2		Level 3		Total Fair Value
Assets:
Cash and cash equivalents	$	188,495	$	—	$	—	$	188,495
Other long-term investments	980		—		—		980
Total assets	$	189,475	$	—	$	—	$	189,475
Liabilities:
Derivative financial instruments	—		24,244		—		24,244
Total liabilities	$	—	$	24,244	$	—	$	24,244