Share-Based Compensation (Summary Of Stock Options Granted To Employees And Non-Employee Directors) (Details) - Stock-Options [Member] - $ / shares	9 Months Ended	12 Months Ended
	Oct. 04, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period, Options	486,004	570,737	486,004
Granted, Options		210,633	118,992	164,503
Exercised, Options		(5,982)	(7,717)	(12,937)
Forfeited, Options		(33,014)	(26,542)	(20,643)
Expired, Options		(6,055)	0	0
Options outstanding at end of period, Options		736,319	570,737	486,004
Options exercisable at end of period, Options		226,386	140,248	78,226
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding at beginning of period, Weighted Average Exercise Price	$ 57.85	$ 56.86	$ 57.85
Granted, Weighted Average Exercise Price		38.89	51.84	$ 70.87
Exercised, Weighted Average Exercise Price	$ 41.17	41.05	33.44	32.41
Forfeited, Weighted Average Exercise Price		45.25	59.25	54.72
Expired, Weighted Average Exercise Price		65.34	0.00	0.00
Options outstanding at end of period, Weighted Average Exercise Price		52.30	56.86	57.85
Options exercisable at end of period, Weighted Average Exercise Price		$ 45.20	$ 43.08	$ 38.75