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Intangible Assets
 12 Months Ended
Sep. 30, 2022
Other Intangible Assets Net [Abstract]  
Intangible Assets Intangible Assets
Intangible assets
(in thousands)September 30, 2022September 30, 2021
Mohegan Sun trademark (1)
$119,692 $119,692 
Mohegan Pennsylvania gaming licenses (1)
171,904 171,904 
Niagara Resorts Casino Operating and Services Agreement rights (2)
16,291 17,612 
Other10,748 25,717 
Intangible assets318,635 334,925 
Accumulated amortization(7,109)(7,670)
Intangible assets, net$311,526 $327,255 
_________
(1)Indefinite lives.    
(2)21-year useful life.
Amortization expense totaled $1.4 million, $1.5 million and $1.4 million for the fiscal years ended September 30, 2022, 2021 and 2020, respectively.
In connection with the termination of the licensing arrangement related to Inspire Korea (refer to Note 4), during fiscal 2022, we recognized an intangible asset impairment of $12.9 million.
As of September 30, 2022, we assessed our intangible assets for any further impairment and determined that no impairment existed.