Changes in Accumulated Other Comprehensive Income by Component (Reclassifications Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ (20,687)	$ (19,536)
Provision (benefit) for taxes	19,985	19,199
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes		(347)
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	0	(347)
Cash Flow Hedging Derivative Activity [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0
Cash Flow Hedging Derivative Activity [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		2,018
Interest Rate Swap [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	$ 0	$ 2,365