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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
5 Months Ended 7 Months Ended 9 Months Ended 12 Months Ended
May 31, 2018
Dec. 31, 2017
Feb. 28, 2019
Feb. 28, 2018
May 31, 2018
Income Tax Disclosure [Abstract]          
Estimated annual effective income tax rate     23.30% 10.30%  
Federal statutory income tax rate 21.00% 35.00%      
Provisional income tax benefit related to re-measurement of deferred tax assets and liabilities         $ 38,200
Provisional income tax expense related to repatriation tax         $ 6,900