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Transactions with Related Parties - Additional Information (Detail) - Management Advisory [Member] - Services Agreement [Member] - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Related Party Transaction [Line Items]    
Annual management fee $ 1.5  
General and Administrative Expense [Member]    
Related Party Transaction [Line Items]    
Annual management fee $ 0.3 $ 0.4