Annual report pursuant to Section 13 and 15(d)

Business Acquisitions - Assets Acquired and Liabilities Assumed (Detail)

v3.21.2
Business Acquisitions - Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Business Acquisition [Line Items]      
Goodwill $ 85,422 $ 46,348 $ 38,546
All Acquisitions for Fiscal Year      
Business Acquisition [Line Items]      
Accounts receivable 110    
Inventories 11,299    
Property, plant and equipment 105,633    
Mineral reserves (included in property, plant and equipment) 56,718    
Intangible assets 75    
Total assets 173,835    
Total liabilities (718)    
Goodwill 39,074 7,800 5,600
Total consideration transferred 210,734 $ 27,500 $ 13,900
Total consideration payable 1,457    
Total purchase price 212,191    
North Carolina Acquisitions - Final      
Business Acquisition [Line Items]      
Accounts receivable 110    
Inventories 4,409    
Property, plant and equipment 60,819    
Mineral reserves (included in property, plant and equipment) 0    
Intangible assets 0    
Total assets 65,338    
Total liabilities 0    
Goodwill 33,320    
Total consideration transferred 97,885    
Total consideration payable 773    
Total purchase price 98,658    
North Carolina Acquisition - Provisional      
Business Acquisition [Line Items]      
Accounts receivable 0    
Inventories 410    
Property, plant and equipment 9,794    
Mineral reserves (included in property, plant and equipment) 18,600    
Intangible assets 0    
Total assets 28,804    
Total liabilities 0    
Goodwill 2,597    
Total consideration transferred 31,167    
Total consideration payable 234    
Total purchase price 31,401    
Alabama Acquisition - Provisional      
Business Acquisition [Line Items]      
Accounts receivable 0    
Inventories 6,480    
Property, plant and equipment 35,020    
Mineral reserves (included in property, plant and equipment) 38,118    
Intangible assets 75    
Total assets 79,693    
Total liabilities (718)    
Goodwill 3,157    
Total consideration transferred 81,682    
Total consideration payable 450    
Total purchase price $ 82,132