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Shareholders' Equity (Deficit): (Tables) | 3 Months Ended
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Mar. 26, 2022
Shareholders' Equity (Deficit): |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted Average |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​
​ | ​ | Number of | ​ | Weighted Average | ​ | Contractual Life | ​ | ​ | ​
​ |  | Shares |  | Exercise Price |  | (years) |  |  | Intrinsic Value
Outstanding, December 25, 2021 |  | 355,621 | ​ | $ | 146.03 | ​ | 6.32 | ​ | $ | 39,320,600
Granted |  | 1,500 | ​ | ​ | 212.18 | ​ | ​ | ​ | ​ | ​
Exercised |  | (9,156) | ​ | ​ | 137.43 | ​ | ​ | ​ | ​ | ​
Outstanding, March 26, 2022 |  | 347,965 | ​ | $ | 146.54 | ​ | 6.09 | ​ | $ | 28,959,900
Exercisable, March 26, 2022 |  | 212,610 | ​ | $ | 113.96 | ​ | 4.48 | ​ | $ | 23,874,000
Schedule of weighted average assumptions used in estimation of fair value of options granted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​
​ |  | March 26, 2022 | ​ | March 27, 2021 | ​ |
Risk free interest rate |  | ​ | 1.88 | % | ​ | 0.64 | % |
Expected life (years) |  | ​ | 6 | ​ | ​ | 6 | ​ |
Expected volatility |  | ​ | 26.64 | % | ​ | 25.05 | % |
Dividend yield |  | ​ | 4.21 | % | ​ | 2.77 | % |
Option fair value | ​ | $ | 33.92 | ​ | $ | 30.02 | ​ | ​

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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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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