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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Compensation |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended December 31, |
​ | ​ | ​ | 2023 | ​ | 2022 | ​ | 2020 |
​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted |
​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise |
​ |  | ​ | Shares | ​ | Price | ​ | Shares | ​ | Price | ​ | Shares | ​ | Price |
Outstanding at January 1, 2023 | ​ |  | 161,832 |  | $ | 66.20 |  | 185,125 |  | $ | 63.03 |  | 256,425 |  | $ | 59.01 | ​
Assumed stock options and warrants from ACBI merger | ​ | ​ | — | ​ | ​ | — | ​ | 23,410 | ​ | ​ | 40.73 | ​ | — | ​ | ​ | — | ​
Exercised | ​ |  | (48,749) | ​ |  | 55.88 | ​ | (43,525) | ​ |  | 41.16 | ​ | (64,075) | ​ |  | 45.35 | ​
Forfeited | ​ |  | — | ​ |  | — | ​ | (356) | ​ |  | 38.31 | ​ | (6,250) | ​ |  | 85.42 | ​
Expired | ​ |  | (5,491) | ​ |  | 32.25 | ​ | (2,822) | ​ |  | 36.98 | ​ | (975) | ​ |  | 24.37 | ​
Outstanding at December 31, 2023 | ​ |  | 107,592 | ​ |  | 72.60 | ​ | 161,832 | ​ |  | 66.20 | ​ | 185,125 | ​ |  | 63.03 | ​
Exercisable at December 31, 2023 | ​ |  | 107,592 | ​ |  | 72.60 | ​ | 161,832 | ​ |  | 66.20 | ​ | 185,125 | ​ |  | 63.03 | ​
Schedule of information pertaining to options outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Options Outstanding | ​ | Options Exercisable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | Weighted | ​ | ​ | ​ | Remaining | ​ | Weighted | ​
Range of | ​ | Number | ​ | Contractual | ​ | Average | ​ | Number | ​ | Contractual | ​ | Average | ​
Exercise Prices | ​ | Outstanding | ​ | Life | ​ | Exercise Price | ​ | Outstanding | ​ | Life | ​ | Exercise Price | ​
$ | 37.72 | - | $ | 40.00 |  | 4,348 |  | 1.1 | years | ​ | $ | 38.32 |  | 4,348 | ​ | 1.1 | years | ​ | $ | 38.32 | ​
$ | 40.01 | - | $ | 55.00 |  | 27,539 |  | 2.9 | years | ​ | $ | 45.42 |  | 27,539 | ​ | 2.9 | years | ​ | $ | 45.42 | ​
$ | 55.01 | - | $ | 70.00 |  | 18,536 |  | 1.2 | years | ​ | $ | 63.93 |  | 18,536 | ​ | 1.2 | years | ​ | $ | 63.93 | ​
$ | 85.01 | - | $ | 91.35 |  | 57,169 |  | 3.6 | years | ​ | $ | 91.12 | ​ | 57,169 | ​ | 3.6 | years | ​ | $ | 91.12 | ​
​ | ​ | ​ | ​ | ​ |  | 107,592 |  | 2.7 | years | ​ | $ | 72.60 |  | 107,592 | ​ | 2.7 | years | ​ | $ | 72.60 | ​
Summary of nonvested restricted stock | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |
​ | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant-Date |
Restricted Stock | ​ | Shares | ​ | Fair Value |
Nonvested at January 1, 2023 |  | 50,506 | ​ | $ | 89.12 | ​
Vested |  | (31,537) | ​ |  | 89.29 | ​
Forfeited |  | (2,721) | ​ |  | 90.00 | ​
Nonvested at December 31, 2023 |  | 16,248 | ​ | $ | 88.63 | ​
Vesting schedule of shares | ​
​ | ​ | ​ | ​
​ |  | Shares |
2024 |  | 11,373 | ​
2025 |  | 4,875 | ​
​ |  | 16,248 | ​
Summary of nonvested RSUs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |
​ | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant-Date |
Restricted Stock Units | ​ | Shares | ​ | Fair Value |
Outstanding at January 1, 2023 |  | 940,512 | ​ | $ | 73.82 | ​
Granted |  | 398,655 | ​ |  | 74.45 | ​
Vested | ​ | (455,443) | ​ | ​ | 71.65 | ​
Forfeited | ​ | (10,676) | ​ | ​ | 76.15 | ​
Outstanding at December 31, 2023 |  | 873,048 | ​ | $ | 75.22 | ​

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: 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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