Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

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

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

		September 30, 2018			September 30, 2017
Financial Assets (Liabilities):	Balance Sheet Location
		(in thousands)
2019 Convertible Notes Hedges — Level 2	Prepaid expenses and other current assets	$	2,552		$	—
2019 Convertible Notes Hedges — Level 2	Other assets, net	—			6,591
2019 Convertible Notes Embedded Derivative — Level 2	Current maturities of long-term debt, net	(2,552		)	—
2019 Convertible Notes Embedded Derivative — Level 2	Long-term debt, net	—			(6,591		)

Financial assets 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 (including those discussed below the following tables) on a recurring basis:

	Carrying Value		Estimated Fair Value
	September 30, 2018		September 30, 2018		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	37,425	$	41,153	$	—	$	—	$	41,153
Investment in unconsolidated affiliate	49,500		49,500		49,500		—		—
Financial liabilities:
2019 Convertible Notes	$	187,433	$	189,150	$	—	$	189,150	$	—
2024 Convertible Notes	105,858		180,399		—		180,399		—
2025 Convertible Notes	119,736		161,253		—		161,253		—
8.5% unsecured notes due 2024	1,304		1,304		—		—		1,304

	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		—

Maximum loss exposure for letter of credit losses

The following table presents the carrying amount and classification of the assets compared to the maximum exposure to loss:

		September 30, 2018				September 30, 2017
Instrument	Balance Sheet Location	Asset Recorded in Consolidated Balance Sheet		Maximum Exposure to Loss		Asset Recorded in Consolidated Balance Sheet		Maximum Exposure to Loss
		(in thousands)				(in thousands)
Notes receivable	Notes receivable, net (including accreted deferred compensation of $9.2 million and $0.1 million as of September 30, 2018 and 2017, respectively)	$	37,425	$	37,425	$	60,975	$	60,975