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Stock-based Compensation and Benefits (Tables) | 9 Months Ended
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Sep. 30, 2024
Stock-based Compensation and Benefits |
Summary of outstanding stock options | The following table summarizes stock option activity for the nine months ended September 30, 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | remaining | ​ | ​ | ​
​ | ​ | ​ | ​ | average | ​ | contractual | ​ | Aggregate
​ | ​ | ​ | ​ | exercise | ​ | term in | ​ | intrinsic
​ | ​ | Options | ​ | price | ​ | years | ​ | value
Outstanding at December 31, 2023 | ​ | 755,546 | ​ | $ | 30.95 | ​ | 5.79 | ​ | $ | 5,270
Granted | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (123,954) | ​ | ​ | 22.26 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (6,477) | ​ | ​ | 37.33 | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2024 | ​ | 625,115 | ​ | ​ | 32.60 | ​ | 5.55 | ​ | ​ | 5,972
Options exercisable at September 30, 2024 | ​ | 529,552 | ​ | ​ | 32.00 | ​ | 5.07 | ​ | ​ | 5,360
Options vested and expected to vest | ​ | 617,974 | ​ | ​ | 32.57 | ​ | 5.52 | ​ | ​ | 5,921
Summary of Restricted Stock Activity | The following table summarizes restricted stock and performance stock unit activity during the nine months ended September 30, 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | Restricted | ​ | average grant- | ​ | Performance | ​ | average grant-
​ | ​ | stock shares | ​ | date fair value | ​ | stock units | ​ | date fair value
Unvested at December 31, 2023 | ​ | 240,584 | ​ | $ | 34.47 | ​ | 171,782 | ​ | $ | 34.56
Granted | ​ | 183,723 | ​ | ​ | 35.31 | ​ | 79,254 | ​ | ​ | 35.24
Adjustment due to performance | ​ | — | ​ | ​ | — | ​ | (530) | ​ | ​ | 35.75
Vested | ​ | (88,311) | ​ | ​ | 35.83 | ​ | (46,490) | ​ | ​ | 37.82
Forfeited | ​ | (18,874) | ​ | ​ | 36.28 | ​ | (3,616) | ​ | ​ | 32.62
Unvested at September 30, 2024 | ​ | 317,122 | ​ | $ | 34.47 | ​ | 200,400 | ​ | $ | 34.30

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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