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Fair Value Measurements
12 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
We measure certain financial assets and liabilities at fair value. Fair value is defined as an “exit price,” which represents the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in valuing an asset or liability. The accounting guidance requires the use of valuation techniques to measure fair value that maximize the use of observable inputs and minimize the use of unobservable inputs. As a basis for considering such assumptions and inputs, a fair value hierarchy has been established that identifies and prioritizes three levels of inputs to be used in measuring fair value.
The three levels of the fair value hierarchy are as follows:
Level 1 — Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.
Level 2 — Inputs other than the quoted prices in active markets that are observable either directly or indirectly, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data.
Level 3 — Unobservable inputs that are supported by little or no market data and require the reporting entity to develop its own assumptions.
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, 2023 (in thousands): 
 Fair Value Measurements at September 30, 2023
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, 2023
Assets:    
Cash and cash equivalents$245,875 $— $— $245,875 
Short-term investments33,134 — — 33,134 
Other assets— 9,117 — 9,117 
Liabilities:    
Deferred compensation— 9,145 — 9,145 
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, 2022 (in thousands):  
 Fair Value Measurements at September 30, 2022
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, 2022
Assets:    
Cash and cash equivalents$101,954 $— $— $101,954 
Short-term investments14,554 — — 14,554 
Other assets— 7,730 — 7,730 
Liabilities:    
Deferred compensation— 7,714 — 7,714 

Fair value guidance requires certain fair value disclosures to be presented in both interim and annual reports. The estimated fair value amounts of financial instruments have been determined using available market information and valuation methodologies described below.
Cash and cash equivalents – Cash and cash equivalents, primarily funds held in money market savings instruments, are reported at their current carrying value, which approximates fair value due to the short-term nature of these instruments and are included in cash and cash equivalents in our Consolidated Balance Sheets.
Short-term Investments – Short-term investments include time deposits with original maturities of three months or more.
Other Assets and Deferred Compensation – We hold investments in the Rabbi Trust for our deferred compensation plan. The assets are primarily related to company-owned life insurance policies and are included in other assets in the accompanying Consolidated Balance Sheets. Because the mutual funds and company-owned life insurance policies are combined in the plan, they are therefore categorized as Level 2 in the fair value measurement hierarchy. The deferred compensation liability represents the investment options that the plan participants have designated to serve as the basis for measurement of the notional value of their accounts. Because the deferred compensation liability is intended to offset the plan assets, it is also categorized as Level 2 in the fair value measurement hierarchy.
There were no transfers between levels within the fair value measurement hierarchy during the year ended September 30, 2023.