Employee Benefit Plans (Schedule of RSU Activity) (Details) - RSUs - $ / shares shares in Thousands	6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Number of shares
Beginning balance (in shares)	132
Granted (in shares)	89
Vested (in shares)	(35)
Cancelled (in shares)	(2)
Other (in shares)	(1)
Ending balance (in shares)	183
Weighted Average Grant Date Fair Value Per Share
Beginning Balance (in dollars per share)	$ 45.54
Granted (in dollars per share)	67.17	$ 53.29
Vested (in dollars per share)	42.31
Cancelled (in dollars per share)	45.30
Other (in dollars per share)	52.85
Ending Balance (in dollars per share)	$ 56.56