Income Taxes (Schedule of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S. Federal									$ 4,761	$ (587)	$ 25,733
State									791	(2,338)	2,435
Foreign									(386)	4,267	1,545
Current, Total									5,166	1,342	29,713
Deferred:
U.S. Federal									(574)	20,930	27,936
State									104	2,514	190
Foreign									(916)	1,092	(482)
Deferred, Total									(1,386)	24,536	27,644
Provision for income taxes	$ 1,045	$ (228)	$ 756	$ 2,207	$ 19,210	$ 5,483	$ 1,271	$ (86)	$ 3,780	$ 25,878	$ 57,357