Changes in Accumulated Other Comprehensive Income by Component Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect of swaps	$ 1,407	$ 315	$ 1,523	$ (56)
Provision (benefit) for taxes	(23,294)	(7,188)	21,100	23,063
Net loss	57,583	43,902	(26,250)	(39,638)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision (benefit) for taxes	224	307	449	614
Net loss	1,462	1,679	2,924	3,357
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	$ 1,686	$ 1,986	$ 3,373	$ 3,971