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Stock-based Compensation and Benefits (Tables) | 3 Months Ended
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Mar. 31, 2023
Stock-based Compensation and Benefits |
Summary of Option Activity | The following table summarizes stock option activity for the three months ended March 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | remaining | ​ | ​ | ​
​ | ​ | ​ | ​ | average | ​ | contractual | ​ | Aggregate
​ | ​ | ​ | ​ | exercise | ​ | term in | ​ | intrinsic
​ | ​ | Options | ​ | price | ​ | years | ​ | value
Outstanding at December 31, 2022 |  | 717,088 | ​ | $ | 29.79 |  | 5.98 | ​ | $ | 8,850
Granted |  | — | ​ |  | — | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (1,900) | ​ | ​ | 18.09 | ​ | ​ | ​ | ​ | ​
Forfeited |  | — | ​ |  | — | ​ | ​ | ​ | ​ | ​
Outstanding at March 31, 2023 |  | 715,188 | ​ | ​ | 29.82 |  | 5.70 | ​ | ​ | 3,863
Options exercisable at March 31, 2023 |  | 520,292 | ​ | ​ | 27.82 |  | 4.80 | ​ | ​ | 3,214
Options vested and expected to vest |  | 704,495 | ​ | ​ | 29.65 |  | 5.66 | ​ | ​ | 3,859
​
Summary of Restricted Stock Activity | The following table summarizes restricted stock and performance stock unit activity during the three months ended March 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted | ​ | ​ | ​ | ​ | Weighted
​ | ​ | Restricted | ​ | average grant- | ​ | Performance | ​ | ​ | average grant-
​ | ​ | stock shares | ​ | date fair value | ​ | stock units | ​ | ​ | date fair value
Unvested at December 31, 2022 | ​ | 165,137 | ​ | $ | 38.28 | ​ | 155,857 | ​ | $ | 33.81
Granted | ​ | 2,836 | ​ | ​ | 40.49 | ​ | — | ​ | ​ | —
Adjustment due to performance | ​ | — | ​ | ​ | — | ​ | 12,084 | ​ | ​ | 24.58
Vested | ​ | (633) | ​ | ​ | 36.22 | ​ | (36,236) | ​ | ​ | 24.58
Forfeited | ​ | (1,162) | ​ | ​ | 38.69 | ​ | (1,030) | ​ | ​ | 37.67
Unvested at March 31, 2023 | ​ | 166,178 | ​ | $ | 38.33 | ​ | 130,675 | ​ | $ | 35.49
​

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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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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