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Significant Accounting Policies - Additional Information (Detail)
 2 Months Ended 3 Months Ended 12 Months Ended
May 21, 2019
$ / shares
shares
Mar. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
Customer
$ / shares
shares
Apr. 18, 2019
shares
Apr. 01, 2019
USD ($)
Mar. 31, 2016
USD ($)
Significant Accounting Policies [Line Items]                
Impairment losses to property, plant, and equipment     $ 211,300,000          
Impairment losses to goodwill and intangible asset impairment     7,019,000          
Impairment of long-lived and intangible assets     220,265,000 $ 0 $ 0      
Allowance for doubtful accounts   $ 9,900,000 9,900,000 8,600,000        
Notes receivable, total   3,600,000 3,600,000          
Notes receivable, current   $ 700,000 $ 700,000          
Notes receivable interest rate   4.50% 4.50%          
Notes receivable, maturity description     Remaining unpaid amounts, plus accrued interest, mature in fiscal 2026.          
Inventories wrote down         8,492,000      
Depreciable assets     $ 118,200,000 109,600,000 86,000,000      
Basis of valuation     Property, Plant, and Equipment are stated at cost.          
Depreciation method     straight-line basis over the estimated useful lives          
Goodwill impairment more likely than not a likelihood as greater percentage of fair value of reportable unit exceeds its carrying value     50.00%          
Reduction of prepaid sand liability         2,000,000      
Intangible Assets, Amortization Expense     $ 4,300,000 $ 4,400,000 $ 4,800,000      
Amortization expense, expected, for fiscal year 2020   $ 2,200,000 2,200,000          
Amortization expense, expected, for fiscal year 2021   1,700,000 1,700,000          
Amortization expense, expected, for fiscal year 2022   1,700,000 1,700,000          
Amortization expense, expected, for fiscal year 2023   1,700,000 1,700,000          
Amortization expense, expected, for fiscal year 2024   1,700,000 1,700,000          
Impairment losses to goodwill, intangible and other asset impairment     $ 9,000,000          
Repurchase of shares | shares     3,309,670 627,722 788,800      
Shares repurchased average price | $ / shares     $ 82.18 $ 97.30 $ 76.08      
Cost of Goods Sold     $ 1,066,673,000 $ 1,047,764,000 $ 899,175,000      
Accumulated other comprehensive loss   3,316,000 3,316,000 4,012,000        
Net of income taxes for accumulated other comprehensive loss     1,100,000          
Interest payments     28,200,000 28,900,000 19,000,000      
Net payments made for federal and state income taxes     40,000,000 69,400,000 76,100,000      
Maintenance and repair expenses     $ 116,300,000 $ 107,300,000 $ 101,500,000      
Stock options excluded from computation of diluted earnings per share | shares     461,575 98,362 513,262      
Stock options, average exercise price per share | $ / shares     $ 90.32 $ 98.75 $ 80.59      
Minimum [Member]                
Significant Accounting Policies [Line Items]                
Long-term supply agreements maturity year     2018          
Revenue from contract with customer collection terms     30 days          
Maximum [Member]                
Significant Accounting Policies [Line Items]                
Long-term supply agreements maturity year     2025          
Revenue from contract with customer collection terms     65 days          
Subsequent Event [Member]                
Significant Accounting Policies [Line Items]                
Number of additional shares authorized to be repurchased | shares           10,000,000    
Outstanding authorization shares | shares           10,724,758    
Repurchase of shares | shares 1,031,110              
Shares repurchased average price | $ / shares $ 88.79              
Stock repurchase remaining number of shares authorized to be repurchased | shares 9,848,648              
Subsequent Event [Member] | Minimum [Member]                
Significant Accounting Policies [Line Items]                
Operating lease liability             $ 70,000,000  
Operating lease right-of-use asset             67,000,000  
Subsequent Event [Member] | Maximum [Member]                
Significant Accounting Policies [Line Items]                
Operating lease liability             75,000,000  
Operating lease right-of-use asset             $ 72,000,000  
Sand [Member]                
Significant Accounting Policies [Line Items]                
Customer advances               $ 2,000,000
Date of contract termination     Jun. 30, 2016          
Freight [Member]                
Significant Accounting Policies [Line Items]                
Cost of Goods Sold     $ 169,600,000 $ 158,300,000 $ 138,000,000      
Customer Contracts And Relationships [Member]                
Significant Accounting Policies [Line Items]                
Intangible Assets, Net   11,073,000 11,073,000 13,528,000        
Oil and Gas Proppants [Member]                
Significant Accounting Policies [Line Items]                
Impairment losses to property, plant, and equipment     211,300,000          
Impairment of long-lived and intangible assets   220,300,000            
Goodwill, impairment loss   6,800,000            
Reduction of prepaid sand liability     2,000,000          
Number of customers terminated contract | Customer         2      
Settlement agreements, amount received         $ 12,900,000      
Oil and Gas Proppants [Member] | Customer Contracts And Relationships [Member]                
Significant Accounting Policies [Line Items]                
Intangible Assets, Net   $ 300,000 $ 300,000 $ 1,600,000        
Intangible assets, wrote-off due to termination of contract         $ 1,300,000      
Oil and Gas Proppants [Member] | Discount Rate [Member] | Discounted Cash Flow Model [Member]                
Significant Accounting Policies [Line Items]                
Estimated discount rate for goodwill impairment   11.00% 11.00%