Employee Benefit Plans (Schedule of RSU Activity) (Details) - RSUs shares in Thousands	6 Months Ended
	Jul. 01, 2018 $ / shares shares
Number of shares
Beginning balance (in shares) | shares	1,130
Granted (in shares) | shares	855
Vested (in shares) | shares	(392)
Cancelled (in shares) | shares	(23)
Ending balance (in shares) | shares	1,570
Weighted Average Grant Date Fair Value Per Share
Beginning Balance (in dollars per share) | $ / shares	$ 43.22
Granted (in dollars per share) | $ / shares	67.60
Vested (in dollars per share) | $ / shares	40.77
Cancelled (in dollars per share) | $ / shares	51.53
Ending Balance (in dollars per share) | $ / shares	$ 56.99