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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Statement of Weighted-Average Assumptions Used and Resulting Weighted-Average Fair Value of Option | The following table presents the weighted-average assumptions used and the resulting weighted-average fair value of each option granted for the years ended December 31, 2021, 2020 and 2019.
|  |  | For the Years Ended December 31,
|  |  | 2021 |  | 2020 |  | 2019
Weighted-average risk-free interest rate |  |  | 1.09 | % |  | — | % |  | 1.69 | %
Expected dividend yield |  |  | — | % |  | — | % |  | — | %
Weighted-average expected volatility |  |  | 41.78 | % |  | — | % |  | 29.92 | %
Weighted-average expected life (in years) |  |  | 7.00 |  | 0.00 |  | 7.00
Weighted-average fair value of each option granted |  |  | $ | 13.24 |  |  | $ | — |  |  | $ | 5.56 |
Summary of Stock Option Activity | The following table summarizes stock option activity for the year ended December 31, 2021:
(dollars in thousands, except weighted-average exercise price) | Number of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term in Years |  | Aggregate Intrinsic Value
Outstanding, December 31, 2020 | 2,306,339 |  |  | $ | 21.32 |  |  |  |  |
Granted | 720,000 |  |  | 29.90 |  |  |  |  |
Exercised | (1,361,626) |  |  | 19.52 |  |  |  |  | $ | 39,293 |
Expired | (896) |  |  | 19.28 |  |  |  |  |
Forfeited | (140,336) |  |  | 28.02 |  |  |  |  |
Outstanding, December 31, 2021 | 1,523,481 |  |  | $ | 26.37 |  |  | 7.0 |  | $ | 59,411 |
Exercisable at December 31, 2021 | 194,356 |  |  | $ | 17.35 |  |  | 3.70 |  | $ | 9,332 |
Summary of Non-Vested Options | A summary of the status of Customers' non-vested options at December 31, 2021, and changes during the year ended December 31, 2021 was as follows:
| Options |  | Weighted- Average exercise price
Non-vested at December 31, 2020 | 1,399,294 |  |  | $ | 24.55 |
Granted | 720,000 |  |  | 29.90 |
Vested | (650,062) |  |  | 23.30 |
Expired | (896) |  |  | 19.28 |
Forfeited | (139,211) |  |  | 28.02 |
Non-vested at December 31, 2021 | 1,329,125 |  |  | 27.69 |
Status of Restricted Stock | The table below presents the status of the restricted stock units at December 31, 2021, and changes during the year ended December 31, 2021:
| Restricted Stock Units |  | Weighted- Average Grant- Date Fair Value
Outstanding and unvested at December 31, 2020 | 1,233,913 |  |  | $ | 20.35 |
Granted | 201,648 |  |  | 29.96 |
Vested | (478,402) |  |  | 20.95 |
Forfeited | (30,915) |  |  | 19.04 |
Outstanding and unvested at December 31, 2021 | 926,244 |  |  | 22.16 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -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 stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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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