STOCKHOLDERS' EQUITY (Tables)
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12 Months Ended |
Dec. 31, 2020 |
| Schedule of the Dividends and Dividend Equivalents Paid |
| | | | | | | | | | | | | | | | | Amount per | | Total Amount | | | | | | | Share of | | Declared | Declaration Date | | Record Date | | Date Paid | | Common Stock | | (In millions) | February 26, 2020 | | March 9, 2020 | | March 23, 2020 | | $ | 0.03 | | $ | 3.2 |
| | | | | | | | | | | | | | | | | Amount per | | Total Amount | | | | | | | Share of | | Declared | Declaration Date | | Record Date | | Date Paid | | Common Stock | | (In millions) | February 15, 2019 | | March 11, 2019 | | March 25, 2019 | | $ | 0.20 | | $ | 21.3 | May 3, 2019 | | June 10, 2019 | | June 24, 2019 | | | 0.20 | | | 21.3 | August 2, 2019 | | September 9, 2019 | | September 23, 2019 | | | 0.20 | | | 21.3 | October 24, 2019 | | December 2, 2019 | | December 16, 2019 | | | 0.20 | | | 21.0 |
| | | | | | | | | | | | | | | | | Amount per | | Total Amount | | | | | | | Share of | | Declared | Declaration Date | | Record Date | | Date Paid | | Common Stock | | (In millions) | February 28, 2018 | | March 12, 2018 | | March 26, 2018 | | $ | 0.20 | | $ | 26.0 | May 3, 2018 | | June 11, 2018 | | June 25, 2018 | | | 0.20 | | | 26.0 | July 24, 2018 | | September 10, 2018 | | September 24, 2018 | | | 0.20 | | | 25.8 | September 14, 2018 | | September 25, 2018 | | September 28, 2018 | | | 1.55 | | | 162.9 | November 1, 2018 | | December 10, 2018 | | December 26, 2018 | | | 0.20 | | | 21.2 |
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| Schedule of Nonvested RSU and PSU Activity |
| | | | | | | | | | Weighted | | | | | Average | | | Shares of RSU | | Grant Date | | | PSU and SPSU | | Fair Value | Beginning balance at January 1, 2018 | | 1,083,841 | | $ | 28.61 | Granted | | 1,313,152 | | | 15.65 | Vested | | (408,848) | | | 21.68 | Forfeited | | (53,698) | | | 20.69 | Beginning balance at January 1, 2019 | | 1,934,447 | | $ | 21.50 | Granted | | 1,960,334 | | | 12.89 | Vested | | (303,201) | | | 21.76 | Forfeited | | (220,632) | | | 17.17 | Cancelled (1) | | (100,855) | | | 21.46 | Beginning balance at January 1, 2020 | | 3,270,093 | | $ | 15.88 | Granted | | 6,517,594 | | | 4.66 | Vested | | (2,472,375) | | | 8.61 | Forfeited | | (1,020,122) | | | 16.97 | Cancelled (1) | | (2,135,929) | | | 7.22 | Nonvested at December 31, 2020 | | 4,159,261 | | $ | 6.80 |
| (1) | Represents vested RSUs and PSUs surrendered in lieu of taxes and cancelled awards returned to the 2013 Equity Incentive Plan. |
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| Special Performance Stock Unit |
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| Schedule of target prices and vesting tranches |
| | | | | Tranche | | Target Stock Price | | SPSUs Vesting | 1 | | $12.00 | | 595,003 | 2 | | $16.00 | | 595,003 | 3 | | $20.00 | | 595,003 | 4 | | $24.00 | | 595,003 | 5 | | $28.00 | | 594,994 | 6 | | $32.00 | | 594,994 |
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| Schedule of assumptions in determining the fair value of the SPSUs |
| | | | | Assumptions | Expected stock price volatility | | 45.0% | Expected dividend yield | | 2.02% and 2.44% | Risk-free interest rate | | 1.33% and 0.92% | Grant-date stock price | | $5.93 and $4.92 |
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