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Debt - Long-Term Debt (Detail) - USD ($)
Jun. 30, 2020
Mar. 31, 2020
Debt Instrument [Line Items]    
Total $ 1,047,754,000 $ 1,099,742,000
Unamortized debt issuance costs (2,321,000) (2,419,000)
Current maturities (7,963,000) (7,955,000)
Long-term debt obligation 1,037,470,000 1,089,368,000
Term Loan Facility [Member]    
Debt Instrument [Line Items]    
Revolving Credit Facility 646,500,000 648,250,000
Senior Notes [Member]    
Debt Instrument [Line Items]    
Senior notes 350,000,000 350,000,000
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Revolving Credit Facility 50,000,000 100,000,000
Equipment Financing [Member]    
Debt Instrument [Line Items]    
Revolving Credit Facility $ 1,254,000 $ 1,492,000