Shareholders' Equity (Deficit): (Tables)

9 Months Ended

Sep. 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 27, 2014	597,700		$	48.50	6.93	$	20,973,700
Granted	39,700		91.93
Exercised	(5,106	)	40.52
Outstanding at September 26, 2015	632,294		$	51.29	6.41	$	30,798,700
Exercisable at September 26, 2015	397,392		$	38.58	5.28	$	24,405,900

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

	Nine Months Ended
	September 26, 2015			September 27, 2014
Risk free interest rate	1.68		%	1.80		%
Expected life (years)	6			6
Expected volatility	30.8		%	34.1		%
Dividend yield	1.34		%	1.80		%
Option fair value	$	25.48		$	19.23

Schedule of a reconciliation of common shares outstanding and total equity (deficit)

	Common Shares		Total Equity (Deficit)
BALANCE, December 27, 2014	4,998,512		$	21,609,500
Repurchase of common stock	(875,000	)	(74,261,500		)
Stock options exercised and related tax benefits	4,519		175,600
Compensation expense relating to stock options	—		1,255,100
Cash dividends	—		(939,200		)
Comprehensive income	—		16,148,700
BALANCE, September 26, 2015	4,128,031		$	(36,011,800	)