Share Based Compensation Plans (SARs) (Details) - Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended
	Apr. 01, 2018	Dec. 31, 2017	Apr. 02, 2017	Jan. 01, 2017	Apr. 01, 2018	Apr. 02, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period, shares					537,930	790,290
Granted, shares					69,752	59,265
Exercised, shares					(17,174)	(181,965)
Forfeited, shares						(9,019)
Outstanding, end of period, shares	590,508	537,930	658,571	790,290	590,508	658,571
Exercisable, shares	467,623		556,388		467,623	556,388
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					$ 23,263	$ 32,659
Exercised, aggregate intrinsic value					848	10,846
Outstanding, end period, aggregate intrinsic value	$ 15,895	$ 23,263	$ 32,339	$ 32,659	15,895	32,339
Exercisable, aggregate intrinsic value	$ 15,834		$ 31,248		$ 15,834	$ 31,248
Outstanding, beginning of period, weighted average remaining contractual term	5 years	4 years 6 months 3 days	5 years	4 years 7 months 9 days
Outstanding, end of period, weighted average remaining contractual term	5 years	4 years 6 months 3 days	5 years	4 years 7 months 9 days
Exercisable, weighted average remaining contractual term	3 years 9 months 22 days		4 years 2 months 13 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					$ 32.00	$ 24.47
Granted, weighted average exercise price					65.00	77.00
Exercised, weighted average exercise price					20.98	19.04
Forfeited, weighted average exercise price						65.21
Outstanding, end of period, weighted average exercise price	$ 36.22	$ 32.00	$ 30.15	$ 24.47	36.22	30.15
Exercisable, weighted average exercise price	$ 28.11		$ 23.09		$ 28.11	$ 23.09