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Treasury Stock Acquisition (Parenthetical) (Detail) | 9 Months Ended
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Sep. 30, 2018 shares
Long Term Incentive Plan |
Schedule of Treasury Stock [Line Items] |
Employees’ tax withholding obligations upon vesting of restricted shares | 561,807

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of restricted shares issued as compensation, net of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |