Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 28, 2015	Dec. 27, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1	[1]
Preferred stock, shares authorized	1,000,000	1,000,000	[1]
Preferred stock, shares issued	0	0	[1]
Common stock, par value	$ 1	$ 1	[1]
Common stock, shares authorized	60,000,000	60,000,000	[1]
Common stock, shares issued	25,908,000	25,692,000	[1]
Common stock, shares outstanding	25,908,000	25,692,000	[1]

[1] Derived from December 27, 2014 audited financial statements