Annual report pursuant to Section 13 and 15(d)

Business Acquisitions - Assets Acquired and Liabilities Assumed (Detail)

v3.22.2.2
Business Acquisitions - Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Business Acquisition [Line Items]        
Goodwill   $ 129,465 $ 85,422 $ 46,348
All Acquisitions for Fiscal Year        
Business Acquisition [Line Items]        
Cash and cash equivalents   1,168    
Contracts receivable including retainage   9,016    
Cost and estimated earnings in excess of billings on uncompleted contracts   125    
Inventories   2,980    
Prepaid expenses and other current assets   213    
Property, plant and equipment   80,291    
Deferred tax assets   2,471    
Intangible assets   9,000    
Total assets   105,264    
Total liabilities   (20,164)    
Accounts payable   2,759    
Billings in excess of costs and estimated earnings on uncompleted contracts   3,123    
Accrued expenses and other current liabilities   6,100    
Unfavorable contract liabilities   7,900    
Deferred tax liabilities   282    
Goodwill   45,300   7,800
Total cash consideration transferred   129,736   $ 27,500
Total consideration payable   664    
Total purchase price   130,400    
Acquisitions Finalized In 2022        
Business Acquisition [Line Items]        
Cash and cash equivalents   1,168    
Acquisitions - Final        
Business Acquisition [Line Items]        
Contracts receivable including retainage   7,162 110  
Cost and estimated earnings in excess of billings on uncompleted contracts   125    
Inventories   1,928 4,819  
Prepaid expenses and other current assets   213    
Property, plant and equipment   45,776 70,613  
Mineral reserves (included in property, plant and equipment)     18,600  
Deferred tax assets   2,237    
Intangible assets   9,000 0  
Total assets   67,609 94,142  
Total liabilities   (12,882) 0  
Accounts payable   2,759    
Billings in excess of costs and estimated earnings on uncompleted contracts   2,697    
Accrued expenses and other current liabilities   2,526    
Unfavorable contract liabilities   4,900    
Deferred tax liabilities   0    
Goodwill   37,647 35,917  
Total cash consideration transferred   92,374 130,059  
Total consideration payable   0    
Total purchase price   92,374    
North Carolina Acquisition - Provisional        
Business Acquisition [Line Items]        
Cash and cash equivalents   0    
Contracts receivable including retainage   1,854    
Cost and estimated earnings in excess of billings on uncompleted contracts   0    
Inventories   64    
Prepaid expenses and other current assets   0    
Property, plant and equipment   3,879    
Deferred tax assets   234    
Intangible assets   0    
Total assets   6,031    
Total liabilities   (1,020)    
Accounts payable   0    
Billings in excess of costs and estimated earnings on uncompleted contracts   426    
Accrued expenses and other current liabilities   594    
Unfavorable contract liabilities   0    
Deferred tax liabilities   0    
Goodwill   7,369    
Total cash consideration transferred   11,716    
Total consideration payable   664    
Total purchase price   12,380    
South Carolina Acquisition - Provisional        
Business Acquisition [Line Items]        
Cash and cash equivalents   0    
Contracts receivable including retainage   0    
Cost and estimated earnings in excess of billings on uncompleted contracts   0    
Inventories   988    
Prepaid expenses and other current assets   0    
Property, plant and equipment   30,636    
Deferred tax assets   0    
Intangible assets   0    
Total assets   31,624    
Total liabilities   (6,262)    
Accounts payable   0    
Billings in excess of costs and estimated earnings on uncompleted contracts   0    
Accrued expenses and other current liabilities   2,980    
Unfavorable contract liabilities   3,000    
Deferred tax liabilities   282    
Goodwill   284    
Total cash consideration transferred   25,646    
Total consideration payable   0    
Total purchase price   25,646    
Alabama Acquisition        
Business Acquisition [Line Items]        
Contracts receivable including retainage     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 $ 2,100   3,157  
Total cash consideration transferred $ 82,100   82,132  
North Carolina and Alabama Acquisitions        
Business Acquisition [Line Items]        
Contracts receivable including retainage   110 110  
Inventories   11,209 11,299  
Property, plant and equipment   105,847 105,633  
Mineral reserves (included in property, plant and equipment)   56,718 56,718  
Intangible assets   3,700 75  
Total assets   177,584 173,835  
Total liabilities   (3,210) (718)  
Goodwill   37,817 39,074  
Total cash consideration transferred   $ 212,191 $ 212,191