Stockholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Stockholders' Equity Note [Abstract]
Shares remaining authorized for repurchase (in shares)	1,000,000
Stock repurchased (in shares)	400,000	0
Cost of stock repurchased	$ 15,000
Common stock repurchased to help administratively facilitate the withholding and subsequent remittance of personal income and payroll taxes for individuals receiving RSUs (in shares)	89,000	38,000
Cost of common stock repurchased to help administratively facilitate the withholding and subsequent remittance of personal income and payroll taxes for individuals receiving RSUs	$ 3,344	$ 2,271