Share Based Compensation Plans (SARs) (Details) - Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, $ in Thousands					9 Months Ended
	Oct. 01, 2017	Jan. 01, 2017	Oct. 02, 2016	Jan. 03, 2016	Oct. 01, 2017	Oct. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period, shares					790,290	891,147
Granted, shares					59,265	121,805
Exercised, shares					(226,468)	(164,616)
Forfeited, shares					(29,082)	(2,400)
Outstanding, end of period, shares	594,005	790,290	845,936	891,147	594,005	845,936
Exercisable, shares	509,674		720,311		509,674	720,311
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value & Average Remaining Contractual Life [Abstract]
Outstanding, beginning of period, aggregate intrinsic value					$ 32,659	$ 36,681
Exercised, aggregate intrinsic value					13,122	8,454
Outstanding, end period, aggregate intrinsic value	$ 23,851	$ 32,659	$ 30,462	$ 36,681	23,851	30,462
Exercisable, aggregate intrinsic value	$ 23,387		$ 29,948		$ 23,387	$ 29,948
Outstanding, beginning of period, weighted average remaining contractual term	4 years 7 months 9 days	4 years 7 months 9 days	5 years	4 years 10 months 29 days
Outstanding, end of period, weighted average remaining contractual term	4 years 7 months 9 days	4 years 7 months 9 days	5 years	4 years 10 months 29 days
Exercisable, weighted average remaining contractual term	3 years 9 months 22 days		4 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning of period, weighted average exercise price					$ 24.47	$ 20.07
Granted, weighted average exercise price					77.00	58.37
Exercised, weighted average exercise price					18.98	16.92
Forfeited, weighted average exercise price					53.43	32.68
Outstanding, end of period, weighted average exercise price	$ 30.39	$ 24.47	$ 26.16	$ 20.07	30.39	26.16
Exercisable, weighted average exercise price	$ 23.31		$ 20.59		$ 23.31	$ 20.59