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Commitments and Contingencies - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jul. 28, 2016
Jun. 16, 2016
Jan. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Commitments And Contingencies [Line Items]              
Letters of credit outstanding, amount       $ 8,800,000      
Contingently liable for performance, current       20,100,000      
Outstanding guarantees       $ 0      
Percentage of expected natural gas usage       25.00%      
Operating leases Rental expense       $ 11,300,000 $ 10,300,000 $ 5,900,000  
NCC [Member]              
Commitments And Contingencies [Line Items]              
Payment of penalty to reduce nitrous oxide emissions     $ 600,000        
Installation of emission control equipment and vehicle replacement period     2 years        
Anticipated cost of investment for new emission control equipment and vehicles     $ 3,000,000        
EPA notice of violation description       In January 2017, NCC entered into a Consent Decree in which NCC agreed to install at its Fernley, Nevada plant certain emission control equipment (selective non-catalytic reduction) to reduce nitrous oxide emissions and to pay a penalty of $0.6 million. NCC also agreed to replace two existing vehicles with two new vehicles with more efficient Tier 4 engines. Under the terms of the Consent Decree, NCC will complete the installation of the emission control equipment and vehicle replacement in approximately 2 years. It is anticipated that the investment in the new emission control equipment and vehicles will cost approximately $3.0 million. In the Consent Decree NCC denies all allegations set forth in the NOVs and the Complaint which is to be filed simultaneously with the entry of the Consent Decree, and the Consent Decree resolves all such claims by the government. The Consent Decree was signed by the EPA and DOJ and was lodged in US District Court for the District of Nevada in May 2017.      
USG Corporation and United States Gypsum [Member]              
Commitments And Contingencies [Line Items]              
Litigation settlement amount             $ 48,000,000
Temple Inland Inc. [Member]              
Commitments And Contingencies [Line Items]              
Litigation settlement amount             $ 7,000,000
Lafarge North America [Member] | Direct Purchaser Class [Member]              
Commitments And Contingencies [Line Items]              
Litigation settlement amount   $ 23,000,000          
Lafarge North America [Member] | Indirect Purchaser Class [Member]              
Commitments And Contingencies [Line Items]              
Litigation settlement amount $ 5,200,000