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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 228,204 $ 222,096
Accumulated depreciation and amortization (86,270) (77,798)
Property and equipment, net 141,934 144,298
Land [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross 55,549 56,549
Buildings and Improvements [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross 115,394 112,892
Machinery and Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross 39,416 36,368
Furniture and Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross 5,233 4,995
Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 12,612 $ 11,292