Related Party Transactions - Franchisees (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Related party transactions
Total revenues	$ 439,619	$ 422,442	$ 422,964	$ 428,595	$ 416,816	$ 389,284	$ 398,991	$ 432,284	$ 1,713,620	$ 1,637,375	$ 1,598,149
Accounts receivable - affiliates	105				157				105	157
Franchisees owned by related parties and PJMF
Related party transactions
Commissary sales									2,620	2,730	3,161
Franchise royalties									413	394	385
Total revenues									3,033	3,124	$ 3,546
Accounts receivable - affiliates	105				$ 157				105	$ 157
Accounts payable - affiliates	$ 12								$ 12