CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock plans (in shares)	7,469	5,214
Issuance of shares under stock grant programs (in shares)	253,289	407,328
Issuance of shares under deferred compensation plans (in shares)	117,068	118,038
Repurchase of shares (in shares)	25,812	2,640