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Income Taxes - Details of Reconciliation of Income Taxes (Detail)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Federal statutory rate 21.00% 21.00% 21.00%
Increase (decrease) in taxes resulting from:      
State and local taxes (6.60%) (13.80%) (7.80%)
Goodwill Impairment (169.10%)    
Nondeductible items (13.20%) (1.80%) (2.90%)
Prior year true-up items (33.50%)   1.80%
Restricted stock (34.50%) (4.50%) 5.10%
Refundable tax credits   0.80% 1.50%
Other, net   (0.80%) (0.10%)
Change in valuation allowance 219.80% (111.50%)  
Effective income tax rate (16.10%) (110.60%) 18.60%