Changes in Accumulated Other Comprehensive Income by Component Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ (1,650)	$ 1,439	$ (8,902)	$ 2,962
Provision (benefit) for taxes	(62,918)	(58,934)	(65,339)	(37,834)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes	(371)	(224)	(990)	(673)
Net income (loss)	1,994	1,462	5,316	4,386
Interest Rate Contracts [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ 2,365	$ 1,686	$ 6,306	$ 5,059