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Acquisitions - Additional Information (Detail)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 10, 2015
USD ($)
T
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Mar. 31, 2015
USD ($)
Nov. 14, 2014
USD ($)
Business Acquisition [Line Items]                
Intangible Assets, Impairment   $ 28,354     $ 28,354      
Operating Loss   56,546   $ 87,995 125,908 $ 154,875    
Intangible Assets   56,200     56,200      
Goodwill   133,885     133,885   $ 132,515  
CRS Proppants [Member]                
Business Acquisition [Line Items]                
Business acquisition purchase price     $ 236,100       $ 237,200  
In-process capital expenditures               $ 192,738
Business acquisition reduction in purchase price     1,100          
Depreciation and amortization   5,700     11,300      
Intangible Assets, Impairment   28,400     28,400      
Write-down of raw sand inventory   9,400     9,400      
Operating Loss   $ (41,257)     (46,066)      
Direct acquisition cost       $ 2,100   $ 2,100    
Accounts and notes receivable               14,640
Inventories               9,627
Intangible Assets               $ 56,200
CRS Proppants [Member] | Fair Value Adjustment to Inventory                
Business Acquisition [Line Items]                
Operating Loss         $ 500      
CRS Proppants [Member] | In-Process Capital Expenditures [Member]                
Business Acquisition [Line Items]                
In-process capital expenditures     $ 8,900          
Skyway Plant [Member]                
Business Acquisition [Line Items]                
Business acquisition purchase price $ 29,900              
In-process capital expenditures $ 24,600              
Ground granulated blast furnace slag purchased | T 600,000              
Business acquisition, refund receivable $ 2,500              
Business acquisition, refund receivable period 18 months              
Accounts and notes receivable $ 1,900              
Inventories 2,300              
Intangible Assets 1,200              
Goodwill 1,400              
Other assets $ 1,000