Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2017

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	December 31, 2017			December 31, 2016			September 30, 2017
		(in thousands)
2019 Convertible Notes Hedges — Level 2	Other assets, net	$	12,863		$	29,800		$	6,591
2019 Convertible Notes Embedded Derivative — Level 2	Long-term debt, net	(12,863		)	(29,800		)	(6,591		)
Deferred and contingent consideration	Accounts payable, accrued expenses and other current liabilities	(1,920		)	—			—

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
	December 31, 2017		December 31, 2017		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	60,025	$	68,720	$	—	$	—	$	68,720
Investment in unconsolidated affiliate	45,605		42,777		42,777		—		—
Financial liabilities:
2019 Convertible Notes	$	179,835	$	201,084	$	—	$	201,084	$	—
2024 Convertible Notes	102,063		201,250		—		201,250		—

	Carrying Value		Estimated Fair Value
	December 31, 2016		December 31, 2016		Fair Value Measurement Using
					Level 1		Level 2		Level 3
	(in thousands)
Financial assets:
Notes receivable, net	$	75,545	$	76,012	$	—	$	—	$	76,012
Investment in unconsolidated affiliate	39,875		38,360		38,360		—		—
Financial liabilities:
2019 Convertible Notes	$	200,728	$	221,950	$	—	$	221,950	$	—
Term Loan Facility	48,408		49,160		—		—		49,160

	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		—