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Income Taxes - Summary of Differences In Effective Tax Rate and Federal Statutory Rate Due to State Income Taxes, Equity Compensation and Other Tax Items (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Tax Disclosure [Abstract]        
Total (loss) income before income taxes $ (189,849) $ 155,284 $ 5,344 $ 162,391
U.S. federal statutory rate 21.00% 21.00% 21.00% 21.00%
Total tax (benefit) expense at statutory rate $ (39,868) $ 32,610 $ 1,122 $ 34,102
State and local income taxes, net of federal benefit (5,822) 5,725 (19) 6,543
Equity compensation 1,259 497 5,101 3,888
Permanent differences and other 1,151 1,267 734 1,254
Total (benefit) expense for income taxes $ (43,280) $ 40,099 $ 6,938 $ 45,787
Effective tax rate 22.80% 25.80%   28.20%