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Acquisitions - Preliminary Allocation of Purchase Price Based on Fair Value of Net Assets Acquired (Detail) - USD ($)
$ in Thousands
Nov. 30, 2019
Aug. 31, 2019
Business Acquisition [Line Items]    
Intangibles and other assets, net $ 36,431  
Goodwill 129,468 $ 129,947
GBW Railcar Services LLC    
Business Acquisition [Line Items]    
Accounts receivable, net 27,595  
Inventories 98,227  
Property, plant and equipment, net 225,045  
Investments in unconsolidated affiliates 40,314  
Intangibles and other assets, net 36,785  
Goodwill 56,339  
Total assets acquired 484,305  
Total liabilities assumed 67,174  
Net assets acquired $ 417,131