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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, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]        
Total income (loss) before income taxes $ 155,284 $ (108,354) $ 162,391 $ (16,440)
U.S. federal statutory rate 21.00% 21.00% 21.00% 21.00%
Total tax expense (benefit) at statutory rate $ 32,610 $ (22,754) $ 34,102 $ (3,452)
State and local income taxes, net of federal benefit 5,725 (3,745) 6,543 749
Equity compensation 497 1,476 3,888 2,140
Change in valuation allowances:        
Federal net operating loss carryforwards (916) 0 (916) 0
State net operating loss carryforwards & other 264 (2,042) 616 13,636
Other (532) 18 (301) 1,399
Permanent differences and other 2,451 (1,471) 1,855 (314)
Total (benefit) expense for income taxes $ 40,099 $ (28,518) $ 45,787 $ 14,158
Effective tax rate 25.80% 26.30% 28.20% (86.10%)