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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]      
Net income $ 74,634 $ 35,985 $ 39,312
Other comprehensive (loss) gain, net of tax:      
Foreign currency translation adjustments 1,498 (669)  
Total other comprehensive (loss) gain, net of tax 1,498 (669)  
Comprehensive income $ 76,132 $ 35,316 $ 39,312