Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Leases [Abstract]
Rent expense, net of sublease income	$ 52,585	$ 45,592	$ 47,026
Future minimum rentals, net of minimum sublease income for five years and thereafter [Abstract]
2017	37,061
2018	32,403
2019	28,535
2020	17,981
2021	11,293
Thereafter	$ 27,662