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Equity-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Percentageofperformancesharepayoutmeasuredbyfreeoperatingcashflow | 0.00% |  | 0.00% |  |
Percentage of performance share payout measured by return on invested capital | 30.00% |  | 30.00% |  |
PercentageofperformancesharepayoutADJUSTMENTmeasuredbytotalshareholderreturn | 0.00% |  | 0.00% |  |
Share-based Payment Arrangement, Expense | $ 1,211 | $ 1,552 | $ 2,389 | $ 3,042 |
Cash paid for minimum tax withholdings |  |  | $ 400 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period |  |  | 71,503 |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price |  |  | $ 51.95 |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable | 519,158 |  | 519,158 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ 51.15 |  | $ 51.15 |  |
Performance shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Payment Arrangement, Expense | $ 184 | 377 | $ 518 | 910 |
Restricted stock units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Payment Arrangement, Expense | 679 | 582 | $ 1,181 | 1,004 |
Shares issued (in shares) |  |  | 32,811 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested Shares Settled |  |  | 47,264 |  |
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Payment Arrangement, Expense | 348 | $ 593 | $ 690 | 1,128 |
Director [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  | 100 | $ (2,000) |
Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent |  |  |  |  | $ 800
Deferred Compensation Cash-based Arrangements, Liability, Classified, Noncurrent | $ 1,800 |  | $ 1,800 |  | $ 1,300
Minimum [Member] | Performance shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Outstanding Award As Percentage Of Shares Issued | 0.00% |  | 0.00% |  |
Maximum | Performance shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Outstanding Award As Percentage Of Shares Issued | 200.00% |  | 200.00% |  |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the period, but did not meet the requisite market condition performance measurement, which resulted in the vested shares settling without payment (excludes forfeited shares and vested shares deferred). + References No definition available. + Details
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