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Income Taxes - Statutory U.S. Federal Income Tax Rate to Company's Effective Tax Rate (Detail)
10 Months Ended 12 Months Ended
Dec. 31, 2017
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2017
Income Tax Disclosure [Abstract]        
Statutory rate 35.00% 21.00% 32.70% 35.00%
Provision for state income taxes, net of federal income tax benefit   2.80% 2.80% 3.50%
Domestic production activities deduction     (2.80%) (2.50%)
Valuation allowance       (3.40%)
Federal true-up   0.40% 4.10% 0.60%
Tax Cuts and Jobs Act     (7.60%)  
Other   0.80% 1.00% 0.80%
Total   25.00% 30.20% 34.00%