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Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2026
Share-Based Payment Arrangement [Abstract] |
Summary of Option Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | Aggregate
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | Intrinsic
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Value
​ |  | Options |  | Exercise Price |  | Contractual Life |  | (in 000’s)
Outstanding options at January 1, 2026 | ​ | 2,986,614 | ​ | $ | 55.69 | ​ | ​ | ​ | ​ | ​
Options granted | ​ | 44,375 | ​ | ​ | 58.74 | ​ | ​ | ​ | ​ | ​
Options exercised | ​ | (60,486) | ​ | ​ | 39.38 | ​ | ​ | ​ | ​ | ​
Options canceled/forfeited | ​ | (2,000) | ​ | ​ | 65.89 | ​ | ​ | ​ | ​ | ​
Outstanding options at March 31, 2026 | ​ | 2,968,503 | ​ | $ | 56.06 | ​ | 3.86 | ​ | $ | 17,285
Exercisable options at March 31, 2026 | ​ | 1,894,941 | ​ | $ | 50.46 | ​ | 2.77 | ​ | $ | 16,509
Summary of Weighted Average Grant-date Assumptions and Weighted Average Fair Values | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2026 |  | 2025 | ​
Weighted-average fair value of grants | ​ | $ | 11.35 | ​ | $ | 16.09 | ​
Risk-free interest rates | ​ | ​ | 3.70 | % | ​ | 4.18 | %
Dividend yield | ​ | ​ | 2.81 | % | ​ | 2.31 | %
Expected volatility | ​ | ​ | 23.21 | % | ​ | 23.13 | %
Expected option life | ​ | ​ | 5.16 | years | ​ | 5.15 | years
Schedule of Restricted Stock Units Activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant Date
​ |  | RSUs |  | Fair Value
Nonvested at January 1, 2026 | ​ | 93,559 | ​ | $ | 71.65
Granted | ​ | 250 | ​ | ​ | 62.78
Reinvested | ​ | 234 | ​ | ​ | 61.48
Vested | ​ | (3,715) | ​ | ​ | 68.03
Nonvested at March 31, 2026 | ​ | 90,328 | ​ | $ | 71.75
​

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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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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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- 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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