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Income Taxes - Income Tax Expense (Benefit) Included in Consolidated Statements of Comprehensive Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current:                      
Federal                 $ 12,626 $ 21,086 $ 18,816
Foreign                 45 45 42
State and local                 2,808 2,475 2,681
Total                 15,479 23,606 21,539
Deferred:                      
Federal                 2,047 (1,086) 4,148
State and local                 741 768 712
Total                 2,788 (318) 4,860
Provision for income taxes from continuing operations $ (1,424) $ 3,297 $ 3,238 $ 13,156 $ (3,368) $ 6,172 $ 4,343 $ 16,141 18,267 23,288 26,399
Operations of discontinued operations:                      
Current                 2 (418) (365)
Deferred                 (1) (19) (10)
Total income tax expense from discontinued operations                 1 (437) (375)
Total income tax expense                 $ 18,268 $ 22,851 $ 26,024