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Income Taxes - Effective Tax Rate Differs from Federal Statutory Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |
Taxes at the U.S. federal statutory rate | $ 76,009 | $ 118,936 | $ 105,779
State income taxes, net of federal tax impact | 13,603 | 10,712 | 9,539
Domestic production activities deduction | 0 | (7,108) | (5,037)
Non-deductible transaction costs | 234 | 541 | 305
Change in valuation allowance | 0 | 3,256 | (4,038)
Tax Cuts and Jobs Act | (740) | 21,961 | 0
Other, net | 1,446 | 3,969 | (454)
Total income tax expense | $ 90,552 | $ 152,267 | $ 106,094
Effective income tax rate (percent) | 25.00% | 44.80% | 35.10%

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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) in income tax rate and transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
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