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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Schedule of components of stock compensation expense | The components of stock compensation expense were as follows:
| Year Ended December 31,
| 2021 |  | 2020
| (in thousands)
2007 Stock Incentive Plan | $ | 1,659 |  |  | $ | 3,142 |
2021 Stock Incentive Plan | 14,678 |  |  | 7,960 |
Employee Stock Purchase Plan | 241 |  |  | 276 |
Total Stock Compensation Expense | $ | 16,578 |  |  | $ | 11,378 |
Summary of restricted stock activity | The following table summarizes restricted stock activity under the 2007 and 2021 Plans for the years ended December 31, 2021 and 2020:
| Number Outstanding |  | Weighted Average Grant Date Fair Value |
Balance as of December 31, 2019 | 505,467 |  |  | $ | 37.70 |  |
Shares granted | 319,350 |  |  | 19.00 |  |
Shares forfeited | — |  |  | — |  |
Shares vested | (243,102) |  |  | 28.35 |  |
Balance as of December 31, 2020 | 581,715 |  |  | 31.34 |  |
Shares granted | 327,550 |  |  | 42.40 |  |
Shares forfeited | — |  |  | — |  |
Shares vested | (348,657) |  |  | 28.66 |  |
Balance as of December 31, 2021 | 560,608 |  |  | $ | 36.30 |  |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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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