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Income Taxes - Summary of Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income tax expense at federal statutory rate |  |  |  |  |  |  |  |  | $ 60,575 | $ 43,636 | $ 30,487
State income taxes, net of federal benefit |  |  |  |  |  |  |  |  | 8,430 | 4,950 | 781
Detriment (benefit) from foreign tax rates |  |  |  |  |  |  |  |  | 3,425 | 3,655 | (8,500)
Valuation allowance on foreign net operating loss carryforward |  |  |  |  |  |  |  |  | 260 | (450) | 253
Other expenses not deductible for tax purposes |  |  |  |  |  |  |  |  | 4,362 | 3,543 | 2,466
Adjustment to reserve for uncertain tax positions |  |  |  |  |  |  |  |  | 2,504 | (132) | 456
Impact of 2017 U.S. tax reform — deferred tax |  |  |  |  |  |  |  |  | 0 | (706) | (63,525)
Impact of 2017 U.S. tax reform — Transition Tax |  |  |  |  |  |  |  |  | (1,088) | 50 | 18,655
Sale of Ringtail business |  |  |  |  |  |  |  |  | (2,097) | 3,798 | 0
Equity-based compensation |  |  |  |  |  |  |  |  | (4,447) | (1,371) | 809
Other adjustments, net |  |  |  |  |  |  |  |  | (200) | 208 | (2,739)
Income tax provision (benefit) | $ 10,624 | $ 19,857 | $ 21,313 | $ 19,930 | $ 7,834 | $ 19,964 | $ 14,113 | $ 15,270 | $ 71,724 | $ 57,181 | $ (20,857)

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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to increase (decrease) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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