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Fair Value Measurements
12 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements
9.
Fair Value Measurements

Other than our assets held for sale, asset group associated with the CRJ-900 fleet, and investments in equity securities described in Notes 7 and 8, respectively, we did not measure any of our assets or liabilities at fair value on a recurring or nonrecurring basis as of September 30, 2023 and 2022.

The carrying values of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable included on the consolidated balance sheets approximated fair value at September 30, 2023 and 2022 because of the immediate or short-term maturity of these financial instruments.

The Company's debt agreements are not traded on an active market. The Company has determined the estimated fair value of its debt to be Level 3, as certain inputs used to determine the fair value of these agreements are unobservable and, therefore, could be sensitive to changes in inputs. The Company utilizes the discounted cash flow method to estimate the fair value of Level 3 debt.

The carrying value and estimated fair value of the Company's long-term debt, including current maturities, were as follows (in millions):

 

 

 

September 30, 2023

 

 

September 30, 2022

 

 

 

Carrying

 

 

Fair

 

 

Carrying

 

 

Fair

 

 

 

Value

 

 

Value

 

 

Value

 

 

Value

 

Long-term debt and finance leases, including
   current maturities
(1)

 

$

538.3

 

 

$

493.6

 

 

$

615.3

 

 

$

541.7

 

 

(1)
Current and prior period long-term debts' carrying and fair values exclude net debt issuance costs.