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Shareholders' Equity: (Tables)

9 Months Ended

Sep. 29, 2012

Shareholders' Equity:

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 31, 2011		668,614		$	24.31		6.62		$	22,101,800
Granted		72,500		53.30
Exercised		(130,287	)	20.12
Outstanding at September 29, 2012		610,827		$	28.65		6.85		$	15,616,100
Exercisable at September 29, 2012		341,938		$	18.79		5.63		$	11,528,500

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

		Nine Months Ended
		September 29, 2012			September 24, 2011
Risk free interest interest rate		0.88		%	1.94		%
Expected life (years)		6			6
Expected volatility		31.4		%	28.0		%
Dividend yield		2.06		%	.32		%
Option fair value		$	12.95		$	11.28

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- Definition

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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- 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://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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