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Stock-Based Compensation Plans and Employee Benefits (Tables) | 9 Months Ended
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Sep. 30, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of performance incentive plans | The following is a summary of the status of the Company’s liability-classified iPIP plans and changes during the nine months ended September 30, 2020.
| iPIP Investment Pool |  |
| 2013-2014 |  | 2015-2016 |  | 2017-2018 |  |  |  |  |  |  |  |
Points at beginning of period | 81.17 |  |  | 73.28 |  |  | 77.27 |  |  |  |  |  |  |  |  |
Forfeited | (1.00) |  |  | (2.88) |  |  | (3.93) |  |  |  |  |  |  |  |  |
Points at end of period | 80.17 |  |  | 70.40 |  |  | 73.34 |  |  |  |  |  |  |  |  |
Schedule of restricted stock units activity | A summary of the Company’s stock-based compensation awards to certain employees in the form of long-term incentive awards for the nine months ended September 30, 2020, is as follows (in thousands):
Nonvested at beginning of period | 598 |  |  |
Granted | 181 |  |  |
Vested | (109) |  |  |
Nonvested at end of period | 670 |  |  |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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