Reconciliation of Share Amount Used in Computation of Basic and Diluted Earnings Per Share (EPS) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Weighted shares outstanding:
Basic-weighted common shares outstanding	141,684	141,324	141,627	141,019
Weighted common shares assumed upon exercise of stock options and vesting of restricted common stock	1,910	1,149	1,845	837
Diluted-weighted common shares and common shares equivalent outstanding	143,594	142,473	143,472	141,856