CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS

6 Months Ended

Mar. 31, 2018

Cash and Cash Equivalents [Abstract]

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS

Cash equivalents consist of instruments with remaining maturities of three months or less at the date of purchase. In general, these investments are free of trading restrictions.

Cash, cash equivalents, restricted cash and short-term investments consisted of the following as of March 31, 2018:



(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	54,378	$	—	$	—		$	54,378
Cash equivalents:
Money market funds ⁽¹⁾	210,809		—		(16		)	210,793
Time deposits ⁽²⁾	55,009		—		—			55,009
Commercial paper ⁽²⁾	19,971		—		—			19,971
Total cash and cash equivalents	$	340,167	$	—	$	(16	)	$	340,151
Restricted Cash ⁽²⁾	535		—		—			535
Total cash, cash equivalents, and restricted cash	$	340,702	$	—	$	(16	)	$	340,686
Short-term investments ⁽²⁾:
Time deposits	192,000		—		—			192,000
Deposits ⁽³⁾	96,000		—		—			96,000
Total short-term investments	$	288,000	$	—	$	—		$	288,000
Total cash, cash equivalents, restricted cash and short-term investments	$	628,702	$	—	$	(16	)	$	628,686


(1)	The fair value was determined using unadjusted prices in active, accessible markets for identical assets, and as such they were classified as Level 1 assets in the fair value hierarchy.


(2)	Fair value approximates cost basis.


(3)	Represents deposits that require a notice period of three months for withdrawal.

Cash, cash equivalents, restricted cash and short-term investments consisted of the following as of September 30, 2017:



(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
Current assets:
Cash	$	65,759	$	—	$	—	$	65,759
Cash equivalents ⁽¹⁾:
Money market funds	232,069		—		—		232,069
Time deposits	89,087		—		—		89,087
Commercial paper	5,495		—		—		5,495
Total cash and cash equivalents	$	392,410	$	—	$	—	$	392,410
Restricted Cash ⁽¹⁾	530						530
Total cash, cash equivalents, and restricted cash	$	392,940	$	—	$	—	$	392,940
Short-term investments ⁽¹⁾:
Time deposits	120,000		—		—		120,000
Deposits ⁽²⁾	96,000		—		—		96,000
Total short-term investments	$	216,000	$	—	$	—	$	216,000
Total cash, cash equivalents, restricted cash and short-term investments	$	608,940	$	—	$	—	$	608,940


(1)	Fair value approximates cost basis.


(2)	Represents deposits that require a notice period of three months for withdrawal.

- Definition

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

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