Related Party Transactions: (Details) (USD $)	12 Months Ended		0 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 20, 2012 Dean B. Phillips Common stock
Related party transactions
Number of shares repurchased			16,000
Aggregate consideration for shares repurchased	$ 7,220,300	$ 3,527,200	$ 889,600
Repurchase price per share (in dollars per share)			$ 55.60