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Shareholders' Equity: (Tables)

12 Months Ended

Dec. 26, 2015

Shareholders' Equity (Deficit):

Schedule of stock option activity under the 2001 Plan, 2010 Plan and Nonemployee Directors Plan

		Number of Shares		Weighted Average Exercise Price			Weighted Average Remaining Contractual Life (years)		Intrinsic Value
Outstanding at December 29, 2012		613,727		$	31.46		7.06		$	16,010,000
Granted		96,250		71.39
Exercised		(176,700	)	18.82
Forfeited		(6,565	)	42.20
Outstanding at December 28, 2013		526,712		42.87			7.33		26,446,700
Granted		97,000		73.31
Exercised		(21,012	)	19.89
Forfeited		(5,000	)	56.85
Outstanding at December 27, 2014		597,700		48.50			6.93		20,973,700
Granted		79,400		91.46
Exercised		(8,360	)	38.46
Outstanding at December 26, 2015		668,740		$	53.73		6.41		$	25,582,300
Exercisable at December 26, 2015		440,577		$	41.76		5.29		$	22,123,700

Schedule of weighted average assumptions used in estimation of fair value of options granted

		Year Ended
		December 26, 2015			December 27, 2014			December 28, 2013
Risk free interest rate		1.71		%	1.75		%	1.60		%
Expected life (years)		6			6			6
Expected volatility		30.15		%	33.2		%	32.9		%
Dividend yield		1.36		%	1.66		%	1.65		%
Fair value per option granted		$	24.88		$	21.02		$	20.36

Schedule of options outstanding and options exercisable

		Options Outstanding							Options Exercisable
				Weighted Average
Range of Exercise Price		Number Outstanding		Remaining Contractual Life (Years)		Weighted Average Exercise Price			Number Exercisable		Weighted Average Exercise Price
$ 12.75 - $ 18.40		52,261		3.03		$	13.97		52,261		$	13.97
20.32 -    31.19		104,674		3.35		25.20			104,674		25.20
32.92 -    51.17		128,519		5.60		40.82			117,203		39.82
53.34 -    80.32		256,136		7.46		62.87			142,564		58.85
82.72 -    91.93		127,150		9.01		88.18			23,875		82.72
		668,740		6.41		$	53.73		440,577		$	41.76

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- References

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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