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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, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ 21,086 | $ 18,816 | $ 18,079
Foreign |  |  |  |  |  |  |  |  | 45 | 42 | 43
State and local |  |  |  |  |  |  |  |  | 2,475 | 2,681 | 2,694
Total |  |  |  |  |  |  |  |  | 23,606 | 21,539 | 20,816
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (1,086) | 4,148 | 1,060
State and local |  |  |  |  |  |  |  |  | 768 | 712 | 953
Total |  |  |  |  |  |  |  |  | (318) | 4,860 | 2,013
Provision for income taxes from continuing operations | $ (3,368) | $ 6,172 | $ 4,343 | $ 16,141 | $ (967) | $ 7,260 | $ 5,306 | $ 14,800 | 23,288 | 26,399 | 22,829
Operations of discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | (418) | (365) | (1,263)
Deferred |  |  |  |  |  |  |  |  | (19) | (10) | 68
Total |  |  |  |  |  |  |  |  | (437) | (375) | (1,195)
Gain on disposal of discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  |  |  | 427
Deferred |  |  |  |  |  |  |  |  |  |  | (344)
Total |  |  |  |  |  |  |  |  |  |  | 83
Total income tax expense from discontinued operations |  |  |  |  |  |  |  |  | (437) | (375) | (1,112)
Total income tax expense |  |  |  |  |  |  |  |  | $ 22,851 | $ 26,024 | $ 21,717

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