Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities Measured on Recurring Basis

The following table summarizes the fair value of our assets and liabilities that were accounted for at fair value on a recurring basis as of September 30, 2017 (in thousands):

	Fair Value Measurements at September 30, 2017
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at September 30, 2017
Assets:
Cash and cash equivalents	$	68,359	$	—	$	—	$	68,359
Short-term investments	26,829		—		—		26,829
Restricted cash	24,851		—		—		24,851
Deferred compensation	—		6,442		—		6,442
Liabilities:
Deferred compensation	—		4,991		—		4,991

The following table summarizes the fair value of our assets and liabilities that were accounted for at fair value on a recurring basis as of September 30, 2016 (in thousands):

	Fair Value Measurements at September 30, 2016
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at September 30, 2016
Assets:
Cash and cash equivalents	$	97,720	$	—	$	—	$	97,720
Deferred compensation	—		5,773		—		5,773
Liabilities:
Deferred compensation	—		4,449		—		4,449