Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2017

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, 2017			September 30, 2016
Financial Assets (Liabilities):	Balance Sheet Location
		(in thousands)
Guarantee asset — Level 3	Prepaid expenses and other current assets	$	—		$	1,209
Guarantee liability — Level 3	Accounts payable, accrued expenses and other current liabilities	—			(1,258		)
2019 Convertible Notes Hedges — Level 2	Other assets, net	6,591			37,692
2019 Convertible Notes Embedded Derivative — Level 2	Long-term debt, net	(6,591		)	(37,692		)

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, 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		—

	Carrying Value		Estimated Fair Value
	September 30, 2016		September 30, 2016		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	83,065	$	83,065	$	—	$	—	$	83,065
Investment in unconsolidated affiliate	37,128		37,128		37,128		—		—
Financial liabilities:
2019 Convertible Notes	$	197,954	$	227,332	$	—	$	227,332	$	—
Term Loan Facility	47,965		48,688		—		48,688		—

Maximum loss exposure for letter of credit losses

The following table presents the carrying amount and classification of the assets and liabilities compared to the maximum exposure to loss for each asset and liability:

		September 30, 2017				September 30, 2016
Instrument	Balance Sheet Location	Asset Recorded in Consolidated Balance Sheet		Maximum Exposure to Loss		Asset (Liability) Recorded in Consolidated Balance Sheet			Maximum Exposure to Loss
		(in thousands)				(in thousands)
Notes receivable	Notes receivable, net (including accreted deferred compensation of $0.1 million)	$	60,975	$	60,975	$	83,065		$	83,065
Guarantee asset	Prepaid expenses and other current assets	—		—		1,209			—
Guarantee liability	Accounts payable, accrued expenses and other current liabilities	—		—		(1,258		)	—