Commitments and Contingencies Operating Leases (Details) $ in Thousands	Dec. 27, 2016 USD ($)
Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 157,659
Operating Leases, Future Minimum Payments, Due in Two Years	152,397
Operating Leases, Future Minimum Payments, Due in Three Years	144,192
Operating Leases, Future Minimum Payments, Due in Four Years	133,532
Operating Leases, Future Minimum Payments, Due in Five Years	122,524
Operating Leases, Future Minimum Payments, Due Thereafter	601,572
Operating Leases, Future Minimum Payments Due	$ 1,311,876