Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Financial assets (liabilities) that are measured at fair value on a recurring basis

The tables below present our financial assets (liabilities) that were carried and measured at fair value on a recurring basis:

Financial Assets (Liabilities)	Balance Sheet Location	June 30, 2018			June 30, 2017			September 30, 2017
		(in thousands)
2019 Convertible Notes Hedges — Level 2	Prepaid expenses and other current assets	$	7,491		$	—		$	—
2019 Convertible Notes Hedges — Level 2	Other assets, net	—			5,900			6,591
2019 Convertible Notes Embedded Derivative — Level 2	Current maturities of long-term debt, net	(7,491		)	—			—
2019 Convertible Notes Embedded Derivative — Level 2	Long-term debt, net	—			(5,900		)	(6,591		)

Financial assets, temporary equity, and liabilities not measured at fair value in the consolidated balance sheet

The tables below present our financial assets and liabilities that were not measured at fair value on a recurring basis:

	Carrying Value		Estimated Fair Value
	June 30, 2018		June 30, 2018		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	51,338	$	57,116	$	—	$	—	$	57,116
Investment in unconsolidated affiliate	61,056		49,205		49,205		—		—
Financial liabilities:
2019 Convertible Notes	$	184,823	$	197,925	$	—	$	197,925	$	—
2024 Convertible Notes	104,562		195,974		—		195,974		—
2025 Convertible Notes	118,335		168,464		—		168,464		—

	Carrying Value		Estimated Fair Value
	June 30, 2017		June 30, 2017		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	63,277	$	65,570	$	—	$	—	$	65,570
Investment in unconsolidated affiliate	41,725		37,306		37,306		—		—
Financial liabilities:
2019 Convertible Notes	$	206,279	$	218,500	$	—	$	218,500	$	—
Term loan facility	48,235		48,159		—		—		48,159

	Carrying Value		Estimated Fair Value
	September 30, 2017		September 30, 2017		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	60,975	$	74,262	$	—	$	—	$	74,262
Investment in unconsolidated affiliate	43,319		49,057		49,057		—		—
Financial liabilities:
2019 Convertible Notes	$	177,346	$	193,811	$	—	$	193,811	$	—
2024 Convertible Notes	100,870		175,016		—		175,016		—