XML 36 R25.htm IDEA: XBRL DOCUMENT
v3.20.2

Shareholders' Equity (Deficit): (Tables) | 9 Months Ended
--- | ---
Sep. 26, 2020
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 28, 2019 |  | 479,558 | ​ | $ | 101.78 | ​ | 5.79 | ​ | $ | 45,283,200
Granted |  | 22,550 | ​ | ​ | 143.87 | ​ | ​ | ​ | ​ | ​
Exercised |  | (87,579) | ​ | ​ | 80.77 | ​ | ​ | ​ | ​ | ​
Forfeited |  | (23,000) | ​ | ​ | 148.16 | ​ | ​ | ​ | ​ | ​
Outstanding, September 26, 2020 |  | 391,529 | ​ | $ | 106.18 | ​ | 5.41 | ​ | $ | 23,296,200
Exercisable, September 26, 2020 |  | 279,164 | ​ | $ | 87.77 | ​ | 4.22 | ​ | $ | 21,578,700
Schedule of weighted average assumptions used in estimation of fair value of options granted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended | ​ | ​
​ |  | September 26, 2020 | ​ | September 28, 2019 | ​ |
Risk free interest rate |  | ​ | 0.40 | % | ​ | 1.98 | % |
Expected life (years) |  | ​ | 6 | ​ | ​ | 6 | ​ |
Expected volatility |  | ​ | 25.03 | % | ​ | 20.30 | % |
Dividend yield |  | ​ | 1.92 | % | ​ | 1.26 | % |
Option fair value | ​ | $ | 26.55 | ​ | $ | 32.65 | ​ | ​

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration