Earnings (Loss) Per Share (Narrative) (Details) - shares	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares issuable on an if-converted basis adjusted to diluted EPS	11,333,333
Options Held [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,566,321	1,984,184
Stock Options And Restricted Stock Units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		657,946