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Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of non-vested PSUs | A summary of activity is presented in the following table:
| For the Years Ended December 31,
| 2021 |  | 2020 |  | 2019
| PSUs (1) |  | Weighted-Average Grant-Date Fair Value |  | PSUs (1) |  | Weighted-Average Grant-Date Fair Value |  | PSUs (1) |  | Weighted-Average Grant-Date Fair Value
Non-vested at beginning of year | 830,464 |  |  | $ | 17.52 |  |  | 2,022,585 |  |  | $ | 16.87 |  |  | 1,711,259 |  |  | $ | 20.68 |
Granted | — |  | $ | — |  |  | — |  |  | $ | — |  |  | 793,125 |  |  | $ | 12.80 |
Vested | (352,395) |  |  | $ | 23.81 |  |  | (792,572) |  |  | $ | 15.85 |  |  | (346,021) |  |  | $ | 26.32 |
Forfeited | (13,586) |  |  | $ | 15.46 |  |  | (399,549) |  |  | $ | 17.56 |  |  | (135,778) |  |  | $ | 16.98 |
Non-vested at end of year | 464,483 |  |  | $ | 12.80 |  |  | 830,464 |  |  | $ | 17.52 |  |  | 2,022,585 |  |  | $ | 16.87 |
____________________________________________ (1)The number of shares of common stock assumes a multiplier of one. The actual final number of shares of common stock to be issued will range from zero to two times the number of PSUs awarded depending on the three-year performance multiplier.
Schedule of shares settled, performance share units | A summary of the shares of common stock issued to settle employee PSUs is presented in the table below:
| For the Years Ended December 31,
| 2021 |  | 2020
Shares of common stock issued to settle PSUs (1) | 347,742 |  |  | 700,511 |
Less: shares of common stock withheld for income and payroll taxes | (112,919) |  |  | (215,451) |
Net shares of common stock issued | 234,823 |  |  | 485,060 |
Multiplier earned | 1.0 |  | 0.9
____________________________________________ (1) During the years ended December 31, 2021, and 2020, the Company settled PSUs that were granted in 2018 and 2017, respectively. The Company and all eligible recipients in 2021 and the majority of eligible recipients in 2020, mutually agreed to net share settle a portion of the awards to cover income and payroll tax withholdings, as provided for in the Equity Plan and applicable award agreements. During the year ended December 31, 2019, PSUs that were granted in 2016 did not satisfy the minimum performance requirements. This resulted in a multiplier of zero times and no shares of common stock were issued upon settlement.
Schedule of non-vested RSUs | A summary of activity is presented in the following table:
| For the Years Ended December 31,
| 2021 |  | 2020 |  | 2019
| RSUs |  | Weighted- Average Grant-Date Fair Value |  | RSUs |  | Weighted- Average Grant-Date Fair Value |  | RSUs |  | Weighted- Average Grant-Date Fair Value
Non-vested at beginning of year | 2,097,860 |  |  | $ | 8.83 |  |  | 1,532,131 |  |  | $ | 16.01 |  |  | 1,243,163 |  |  | $ | 21.50 |
Granted | 666,052 |  |  | $ | 25.52 |  |  | 1,458,869 |  |  | $ | 5.98 |  |  | 978,932 |  |  | $ | 12.36 |
Vested | (843,098) |  |  | $ | 11.00 |  |  | (746,132) |  |  | $ | 16.74 |  |  | (466,535) |  |  | $ | 21.94 |
Forfeited | (79,577) |  |  | $ | 10.64 |  |  | (147,008) |  |  | $ | 15.34 |  |  | (223,429) |  |  | $ | 18.16 |
Non-vested at end of year | 1,841,237 |  |  | $ | 13.79 |  |  | 2,097,860 |  |  | $ | 8.83 |  |  | 1,532,131 |  |  | $ | 16.01 |
Schedule of shares settled, restricted stock units | A summary of the shares of common stock issued to settle employee RSUs is presented in the table below:
| For the Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Shares of common stock issued to settle RSUs (1) | 843,098 |  |  | 746,132 |  |  | 466,535 |
Less: shares of common stock withheld for income and payroll taxes | (250,349) |  |  | (209,173) |  |  | (132,136) |
Net shares of common stock issued | 592,749 |  |  | 536,959 |  |  | 334,399 |
____________________________________________ (1) During the years ended December 31, 2021, 2020, and 2019, the Company issued shares of common stock to settle RSUs that related to awards granted in previous years. The Company and all eligible recipients in 2021, and the majority of eligible recipients in 2020, and 2019 mutually agreed to net share settle a portion of the awards to cover income and payroll tax withholdings in accordance with the Company’s Equity Plan and individual award agreements.
Schedule of employee stock purchase plan | The fair value of ESPP shares issued during the periods reported above were estimated using the following weighted-average assumptions:
| For the Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Risk free interest rate | 0.8 | % |  | 0.8 | % |  | 2.3 | %
Dividend yield | 0.3 | % |  | 0.7 | % |  | 0.7 | %
Volatility factor of the expected market price of the Company’s common stock | 106.1 | % |  | 166.2 | % |  | 56.6 | %
Expected life (in years) | 0.5 |  | 0.5 |  | 0.5

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based 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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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