OTHER CURRENT AND LONG-TERM LIABILITIES (Other Long-Term Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013	Sep. 28, 2013
Other Liabilities Disclosure [Abstract]
Deferred lease incentives	$ 65,731	$ 68,876	$ 67,988
Accrued rent	38,812	31,821	26,525
Contingent consideration	0	7,384	6,794
Accrued workers' compensation	4,270	0	0
OshKosh pension plan	3,303	3,768	13,638
Unrecognized tax benefits	12,928	11,947	11,468
Post-retirement medical plan	5,458	5,055	6,201
Deferred compensation	7,578	6,225	5,445
Other	105	104	160
Total	$ 138,185	$ 135,180	$ 138,219