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Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
May 20, 2016
Jul. 31, 2015
Mar. 31, 2016
Sep. 30, 2015
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2016
Aug. 10, 2015
Jul. 30, 2012
Significant Accounting Policies [Line Items]                    
Ownership percentage     50.00%   50.00%          
Allowance for doubtful accounts     $ 10,200   $ 10,200 $ 7,100        
Notes receivable, total     2,900   2,900          
Notes receivable, current     $ 200   $ 200          
Notes receivable interest rate     3.50%   3.50%          
Notes Receivable basis spread on Prime rate         3.90%          
Notes receivable, maturity period         2017-03          
Depreciable assets         $ 84,200 69,700 $ 67,300      
Basis of valuation         Property, plant and equipment are stated at cost          
Depreciation method         straight-line basis over the estimated useful lives          
Impairment of Intangible Assets     $ 6,600 $ 28,400 $ 34,999          
Reduction of prepaid sand liability     10,700   10,658          
Intangible Assets, Amortization Expense         12,911 $ 5,700 $ 1,700      
Amortization expense, expected, for fiscal years 2017     3,400   3,400          
Amortization expense, expected, for fiscal years 2018     3,000   3,000          
Amortization expense, expected, for fiscal years 2019     3,000   3,000          
Amortization expense, expected, for fiscal years 2020     2,000   2,000          
Amortization expense, expected, for fiscal years 2021     1,200   $ 1,200          
Number of additional shares authorized to be repurchased                 6,782,700  
Outstanding authorization shares                 7,500,000  
Repurchase of shares         1,894,000 0 0      
Shares repurchased average price         $ 65.24          
Freight costs as cost of goods sold         $ 139,500 $ 124,000 $ 113,100      
Accumulated other comprehensive loss     11,409   11,409 12,067        
Net of income taxes for accumulated other comprehensive loss         6,800          
Interest payments         16,900 15,100 17,000      
Net payments made for federal and state income taxes         63,900 78,300 41,700      
Maintenance and repair expenses         $ 95,100 $ 86,700 $ 77,400      
Stock options excluded from computation of diluted earnings per share         688,420 285,267 146,696      
Stock options, average exercise price per share         $ 80.51 $ 82.72 $ 65.12      
Accounting Standards Update 2015-17 [Member]                    
Significant Accounting Policies [Line Items]                    
Reclassification from current assets to long-term liabilities     2,300   $ 2,300          
Subsequent Event [Member]                    
Significant Accounting Policies [Line Items]                    
Repurchase of shares 230,000                  
Shares repurchased average price $ 69.80                  
Stock repurchase remaining number of shares authorized to be repurchased 5,376,000                  
Skyway Plant [Member]                    
Significant Accounting Policies [Line Items]                    
Approximate increase in goodwill during period   $ 1,400                
Sand [Member]                    
Significant Accounting Policies [Line Items]                    
Customer advances           $ 12,700       $ 15,000
Date of contract termination         Jun. 30, 2016          
Sand [Member] | Scenario Forecast [Member]                    
Significant Accounting Policies [Line Items]                    
Forfeited customer advances               $ 2,000    
Sand [Member] | Other Long-term Liabilities [Member]                    
Significant Accounting Policies [Line Items]                    
Customer advances     2,000   $ 2,000          
Customer Contracts And Relationships [Member]                    
Significant Accounting Policies [Line Items]                    
Impairment of Intangible Assets         34,999          
Intangible Assets, Net     10,633   10,633 56,066        
Intangible Assets, Amortization Expense         11,634          
Customer Contracts And Relationships [Member] | Skyway Plant [Member]                    
Significant Accounting Policies [Line Items]                    
Finite-lived intangible assets acquired   $ 1,200                
Oil and Gas Proppants [Member]                    
Significant Accounting Policies [Line Items]                    
Forfeited customer advances     10,700   10,700          
Reduction of prepaid sand liability         10,700          
Oil and Gas Proppants [Member] | Customer Contracts And Relationships [Member]                    
Significant Accounting Policies [Line Items]                    
Intangible Assets, Net     5,600   5,600          
Notes Receivable [Member]                    
Significant Accounting Policies [Line Items]                    
Allowance for doubtful accounts     $ 300   $ 300 $ 300