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Summarized Financial Information for Joint Venture Unconsolidated (Detail) - Joint Venture [Member] - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Related Party Transaction [Line Items]      
Revenue $ 50,600 $ 55,010  
Gross Margin 16,765 19,866  
Earnings Before Income Taxes 15,727 $ 19,017  
Current Assets 70,153   $ 77,331
Non-Current Assets 99,488   93,093
Current Liabilities $ 18,302   $ 17,197