CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net Income (Loss)	$ (300,162)	$ 373,989	$ 18,803
Pension and post retirement plans:
Change in pension and post-retirement benefit plans, net of taxes of $2,936, $73,922 and $(117,853)	(4,404)	(110,883)	176,779
Investment in unconsolidated companies:
Other comprehensive income (loss), net of taxes of $534, $546, and $243	(801)	(819)	(364)
Other comprehensive income (loss)	(5,205)	(111,702)	176,415
Comprehensive income (loss)	$ (305,367)	$ 262,287	$ 195,218