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Employee Incentive Plans (2007 Stock Incentive Plan, ROI Summary) (Details) | 9 Months Ended
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Sep. 30, 2021 shares
Stock Incentive Plan Granted Shares Adjustment | 7,034 |
2007 Stock Incentive Plan (Shares) |  |
Beginning Balance | 4,974,355 | [1]
Shares Granted |  |
Shares Cancelled | (40,495) |
Shares Distributed | (1,215,965) |
Ending Balance | 3,717,895 |
[1] | Stock Incentive Plan number of granted restricted stock units related to 2020 was adjusted by 7,034 additional restricted stock units during the nine months ended September 30, 2021.

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- Definition Shares granted, net of shares distributed and forfeited. + References No definition available. + Details
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- Definition Shares granted during the period. + References No definition available. + Details
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- Details
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