Stockholders' Equity (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Jul. 19, 2019
Stockholders' Equity Note [Abstract]
Shares remaining authorized for repurchase (in shares)	4,300				4,300
Stock repurchased (in shares)					1,700	200
Cost of stock repurchased	$ 21,966	$ 16,980	$ 15,000	$ 15,000	$ 53,900	$ 15,000
RSU withholdings (in shares)					200	100
RSU withholdings					$ 6,058	$ 7,583
Number of Shares Authorized to be Repurchased							4,500