Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Financial Assets, Temporary Equity, and Liabilities Not Measured at Fair Value in the Consolidated Balance Sheet

The tables below present our estimates of fair value of financial assets and liabilities that were not measured at fair value:

	Carrying Value		Estimated Fair Value
	March 31, 2022		March 31, 2022		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,198	$	1,198	$	—	$	—	$	1,198
Investments in unconsolidated affiliates	42,002		51,502		44,529		—		6,973
Other investments	18,000		18,000		—		—		18,000
Financial liabilities:
2024 Convertible Notes	$	142,248	$	141,594	$	—	$	141,594	$	—
2025 Convertible Notes	169,920		153,525		—		153,525		—

	Carrying Value		Estimated Fair Value
	March 31, 2021		March 31, 2021		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,164	$	1,164	$	—	$	—	$	1,164
Investments in unconsolidated affiliates	34,961		45,581		37,984		—		7,597
Financial liabilities:
2024 Convertible Notes	$	120,307	$	132,609	$	—	$	132,609	$	—
2025 Convertible Notes	136,836		143,175		—		143,175		—

	Carrying Value		Estimated Fair Value
	September 30, 2021		September 30, 2021		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,181	$	1,181	$	—	$	—	$	1,181
Investments in unconsolidated affiliates	37,724		48,954		41,638		—		7,316
Financial liabilities:
2024 Convertible Notes	$	123,543	$	153,281	$	—	$	153,281	$	—
2025 Convertible Notes	140,643		155,250		—		155,250		—