Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Quarterly Financial Data Table [Abstract]
Revenues	$ 309,247	$ 308,000	$ 320,342	$ 285,819	$ 309,901	$ 364,012	$ 382,718	$ 378,787	$ 1,223,408	$ 1,435,418	$ 1,870,297
Cost of sales	127,793	132,387	129,360	123,407	140,865	186,546	202,554	214,736	512,947	744,701	1,184,073
Operating profit	66,587	61,657	25,794	60,720	79,215	106,088	65,648	63,829	214,758	314,780	274,470
Income from continuing operations									194,029	129,624	139,979
Net income (loss) from discontinued operations									0	0	21,163
Net income (loss)	$ 159,276	$ 14,257	$ (1,845)	$ 22,341	$ 28,891	$ 48,890	$ 26,480	$ 25,363	$ 194,029	$ 129,624	$ 161,142
Basic income per share
Continuing operations									$ 0.79	$ 0.49	$ 0.43
Discontinued operations									0.00	0.00	0.07
Basic income (loss) per share	$ 0.66	$ 0.06	$ (0.01)	$ 0.09	$ 0.11	$ 0.19	$ 0.10	$ 0.09	0.79	0.49	0.50
Diluted income per share
Continuing operations									0.77	0.49	0.43
Discontinued operations									0.00	0.00	0.06
Diluted income (loss) per share	$ 0.64	$ 0.06	$ (0.01)	$ 0.09	$ 0.11	$ 0.18	$ 0.10	$ 0.09	$ 0.77	$ 0.49	$ 0.49
System optimization (losses) gains, net			$ (41,050)		$ 23,825	$ 37,756		$ 8,426	$ (39,076)	$ 71,931	$ 74,009
Reorganization and realignment costs	$ 1,806	$ 2,888	$ 17,699		2,217	$ 2,129	$ 2,487	3,250	22,574	10,083	21,910
Income tax benefit (provision)	$ 121,649								93,010	(72,066)	(94,149)
Impairment of long-lived assets					$ 3,250		$ 5,525	7,105	$ 4,097	$ 16,241	$ 25,001
Gain on lease buyout								$ 11,606