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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Stock Compensation Plan Transactions | The table below summarizes the transactions under the Company’s active stock compensation plans at December 31, 2020, 2019 and 2018, and changes during the years then ended:
|  | Stock Options Outstanding |  | Non-vested Stock Awards Outstanding |  | Non-vested Stock Units Outstanding
(Shares in thousands) |  | Number of Shares |  | Weighted Average Exercise Price |  | Number of Shares |  | Weighted Average Grant-Date Fair Value |  | Number of Shares |  | Weighted Average Grant-Date Fair Value
Balance, December 31, 2017 |  | 812 |  |  | $ | 21.98 |  |  | 162 |  |  | $ | 20.85 |  |  | 828 |  |  | $ | 26.13 |
Granted |  | — |  |  | — |  |  | — |  |  | — |  |  | 429 |  |  | 29.16 |
Stock options exercised |  | (112) |  |  | 19.22 |  |  | — |  |  | — |  |  | — |  |  | — |
Stock awards/units vested (earned) |  | — |  |  | — |  |  | (80) |  |  | 20.41 |  |  | (311) |  |  | 25.56 |
Forfeited/expired |  | (5) |  |  | 21.73 |  |  | (10) |  |  | 20.12 |  |  | (129) |  |  | 27.95 |
Balance, December 31, 2018 |  | 695 |  |  | 22.42 |  |  | 72 |  |  | 21.45 |  |  | 817 |  |  | 27.65 |
Granted |  | — |  |  | — |  |  | — |  |  | — |  |  | 842 |  |  | 26.05 |
Stock options exercised |  | (3) |  |  | 12.79 |  |  | — |  |  | — |  |  | — |  |  | — |
Stock awards/units vested (earned) |  | — |  |  | — |  |  | (49) |  |  | 20.72 |  |  | (405) |  |  | 26.75 |
Forfeited/expired |  | — |  |  | — |  |  | (2) |  |  | 21.82 |  |  | (102) |  |  | 28.10 |
Balance, December 31, 2019 |  | 692 |  |  | 22.46 |  |  | 21 |  |  | 23.19 |  |  | 1,152 |  |  | 26.79 |
Granted |  | — |  |  | — |  |  | — |  |  | — |  |  | 568 |  |  | 21.69 |
Stock options exercised |  | (1) |  |  | 10.71 |  |  | — |  |  | — |  |  | — |  |  | — |
Stock awards/units vested (earned) |  | — |  |  | — |  |  | (16) |  |  | 23.41 |  |  | (550) |  |  | 25.90 |
Forfeited/expired |  | (33) |  |  | 22.49 |  |  | — |  |  | — |  |  | (138) |  |  | 26.12 |
Balance, December 31, 2020 |  | 658 |  |  | $ | 22.48 |  |  | 5 |  |  | $ | 22.35 |  |  | 1,032 |  |  | $ | 24.53 |
Exercisable, December 31, 2020 |  | 658 |  |  | $ | 22.48 |  |  |  |  |  |  |  |  |
Information about Stock Options under Plans Outstanding | The following table summarizes information about stock options under the plans outstanding at December 31, 2020:
|  |  |  |  |  | Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Number of Shares (In thousands) |  | Weighted Average Remaining Contractual Life (Years) |  | Weighted Average Exercise Price |  | Number of Shares (In thousands) |  | Weighted Average Exercise Price
$ | 9.46 |  |  | — |  | $ | 9.46 |  |  | 1 |  | 0.87 |  | $9.46 |  | 1 |  | $9.46
10.65 |  |  | — |  | 10.65 |  |  | 3 |  | 2.08 |  | 10.65 |  | 3 |  | 10.65
20.29 |  |  | — |  | 20.29 |  |  | 66 |  | 2.99 |  | 20.29 |  | 66 |  | 20.29
20.36 |  |  | — |  | 20.36 |  |  | 2 |  | 3.88 |  | 20.36 |  | 2 |  | 20.36
22.20 |  |  | — |  | 22.20 |  |  | 74 |  | 3.13 |  | 22.20 |  | 74 |  | 22.20
22.75 |  |  | — |  | 22.75 |  |  | 412 |  | 3.69 |  | 22.75 |  | 412 |  | 22.75
23.51 |  |  | — |  | 23.51 |  |  | 93 |  | 4.11 |  | 23.51 |  | 93 |  | 23.51
24.07 |  |  | — |  | 24.07 |  |  | 7 |  | 4.71 |  | 24.07 |  | 7 |  | 24.07
$ | 9.46 |  |  | — |  | $ | 24.07 |  |  | 658 |  | 3.62 |  | $22.48 |  | 658 |  | $22.48
Restricted Performance Stock Unit Activity | The table below summarizes the Company’s performance stock unit activity for the years ended December 31, 2020, 2019 and 2018:
(In thousands) |  | Performance Stock Units
Non-vested, December 31, 2017 |  | 177 |
Granted |  | 72 |
Vested (earned) |  | (55) |
Forfeited |  | (17) |
Non-vested, December 31, 2018 |  | 177 |
Granted |  | 118 |
Vested (earned) |  | (93) |
Forfeited |  | (3) |
Non-vested, December 31, 2019 |  | 199 |
Granted |  | 122 |
Vested (earned) |  | (81) |
Forfeited |  | (18) |
Non-vested, December 31, 2020 |  | 222 |

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