Changes in Accumulated Other Comprehensive Income by Component Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ 952	$ (1,650)	$ (3,717)	$ (8,902)
Provision (benefit) for taxes	(73,747)	(62,918)	(63,769)	(65,339)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes	(371)	(371)	(1,113)	(990)
Net income (loss)	1,994	1,994	5,981	5,316
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes	(371)	(371)	(1,113)	(990)
Interest Rate Contracts [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ 2,365	$ 2,365	$ 7,094	$ 6,306