Share-based Compensation - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan of 2008 - Employee Stock	12 Months Ended
	Dec. 28, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligibility service requirement (in hours)	20 hours
Discounted purchase price, percent	95.00%
Employee payroll deductions, percent	10.00%
Employee maximum annual contribution | $	$ 25,000
Employee stock purchase plan, shares available (in shares)	109,585
Shares purchased during the year (in shares)	19,677
Employee stock purchase plan, weighted average fair value per share (in dollars per share) | $ / shares	$ 25.82