Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Shares issued under stock incentive plans, net of forfeitures	(488,655)	1,200,527	721,621
Shares issued for stock options exercised, net	1,247,064	530,585	941,157
Cash dividends declared per share	$ 0.24	$ 0.24	$ 0.24
Issuance of treasury shares	44,480	57,798	40,016
Purchase of common stock for treasury	(1,639,732)	(2,838,919)	(4,804,665)
Purchases of shares under employee stock plans	(227,464)	(283,578)	(276,275)