CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	3 Months Ended
	Apr. 01, 2017	Mar. 26, 2016
Statement of Stockholders' Equity [Abstract]
Purchase of treasury shares, shares acquired (in shares)		153,962
Stock plan exercises; shares acquired (in shares)	17,985	1,895
Stock options exercised; shares issued (in shares)	77,336	12,771
Stock awards; shares issued (in shares)	1,583	4,540