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Income Taxes - Schedule of Provision for (Benefits from) Income Taxes from Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
State and local $ 524 $ 1,870 $ 704
Total current provision 524 1,870 704
Federal 16,144 67,936 (16,247)
State and local 1,893 (2,681) (1,007)
Total deferred provision (benefit) 18,037 65,255 (17,254)
Total provision for (benefit from) income taxes $ 18,561 $ 67,125 $ (16,550)