Shareholders' Equity (Deficit): Stock Option Plans and Stock-Based Compensation (Details) - Stock options - USD ($)	6 Months Ended		12 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Dec. 26, 2015	Feb. 20, 2011
Number of Shares
Outstanding at the beginning of the period (in shares)	668,740
Granted (in shares)	34,300
Exercised (in shares)	(2,187)
Forfeited (in shares)	(3,501)
Outstanding at the end of the period (in shares)	697,352		668,740
Exercisable at the end of the period (in shares)	489,067
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 53.73
Granted (in dollars per share)	98.25
Exercised (in dollars per share)	68.69
Forfeited (in dollars per share)	80.31
Outstanding at the end of the period (in dollars per share)	55.74		$ 53.73
Exercisable at the end of the period (in dollars per share)	$ 44.07
Weighted Average Remaining Contractual Life (years)
Outstanding	6 years 1 month 2 days		6 years 4 months 28 days
Exercisable at the end of the period	5 years 11 days
Intrinsic Value
Outstanding	$ 29,349,500		$ 25,582,300
Exercisable at the end of the period	$ 26,275,800
Weighted average assumptions and results used in estimation of fair value of options granted
Risk free interest rate (as a percent)	1.52%	1.68%
Expected life (years)	6 years	6 years
Expected volatility (as a percent)	27.10%	30.80%
Dividend yield (as a percent)	1.38%	1.34%
Option fair value (in dollars per share)	$ 23.78	$ 25.48
Additional disclosures
Compensation expense	$ 882,200	$ 820,400
Total unrecognized compensation expense	$ 3,900,000
Weighted average period for recognition of unrecognized compensation expense	2 years 7 months 6 days
2001 Plan
Stock Option Plans
Number of shares authorized for issuance				750,000
2010 Plan
Stock Option Plans
Number of shares authorized for issuance	500,000
Nonemployee Directors Plan
Stock Option Plans
Number of shares authorized for issuance	350,000