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v3.21.2

Performance Units (Detail) | 6 Months Ended
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Jun. 30, 2021 shares
2021 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Target number of shares | 843,000
2020 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Target number of shares | 500,500
2019 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Target number of shares | 489,800
2018 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Target number of shares | 310,700
2017 |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Target number of shares | 186,198

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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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