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Property Plant, and Equipment - Summary of Components of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, at cost $ 159,370 $ 113,093
Less accumulated depreciation 47,422 45,133
Property, plant, and equipment, net 111,948 67,960
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, at cost 34,545 22,071
Building and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, at cost 84,974 58,179
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, at cost 37,279 31,924
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, at cost $ 2,572 $ 919