Condensed Consolidating Financial Statements (Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2014	Mar. 26, 2013
Operating activities
Net cash flows provided by operating activities	$ 24,773	$ 36,798
Investing activities
Capital expenditures	(19,246)	(9,630)
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	324	40
Net cash used in investing activities	(18,922)	(9,590)
Financing activities
Accrued purchase price paid to sellers	(10,875)	(602)
Net payments on debt	(7,625)
Distribution to parent	0
Net cash used in financing activities	(18,500)	(640)
Net change in cash and cash equivalents	(12,649)	26,568
Beginning cash and cash equivalents	20,035	25,493
Ending cash and cash equivalents	7,386	52,061
Parent Guarantor: Holdings
Operating activities
Net cash flows provided by operating activities	0	0
Investing activities
Capital expenditures	0	0
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	0	0
Net cash used in investing activities	0	0
Financing activities
Accrued purchase price paid to sellers	0
Net payments on debt	0
Distribution to parent	0
Net cash used in financing activities	0	0
Net change in cash and cash equivalents	0	0
Beginning cash and cash equivalents	0	0
Ending cash and cash equivalents	0	0
Subsidiary Issuer: NPC
Operating activities
Net cash flows provided by operating activities	20,390	36,798
Investing activities
Capital expenditures	(18,191)	(9,630)
Return of investment in NPCQB	3,387
Proceeds from sale or disposition of assets	324	40
Net cash used in investing activities	(14,480)	(9,590)
Financing activities
Accrued purchase price paid to sellers	(10,875)
Net payments on debt	(7,625)
Distribution to parent	0
Net cash used in financing activities	(18,500)	(640)
Net change in cash and cash equivalents	(12,590)	26,568
Beginning cash and cash equivalents	19,170	25,493
Ending cash and cash equivalents	6,580	52,061
Subsidiary Co-Issuer: NPCQB
Operating activities
Net cash flows provided by operating activities	4,383	0
Investing activities
Capital expenditures	(1,055)	0
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	0	0
Net cash used in investing activities	(1,055)
Financing activities
Accrued purchase price paid to sellers	0
Net payments on debt	0
Distribution to parent	(3,387)
Net cash used in financing activities	(3,387)
Net change in cash and cash equivalents	(59)
Beginning cash and cash equivalents	865	0
Ending cash and cash equivalents	806	0
Subsidiary Co-Issuer: NPC Op Co B
Operating activities
Net cash flows provided by operating activities	0	0
Investing activities
Capital expenditures	0	0
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	0	0
Net cash used in investing activities	0	0
Financing activities
Accrued purchase price paid to sellers	0
Net payments on debt	0
Distribution to parent	0
Net cash used in financing activities	0	0
Net change in cash and cash equivalents	0	0
Beginning cash and cash equivalents	0	0
Ending cash and cash equivalents	0	0
Eliminations
Operating activities
Net cash flows provided by operating activities	0	0
Investing activities
Capital expenditures	0	0
Return of investment in NPCQB	(3,387)
Proceeds from sale or disposition of assets	0	0
Net cash used in investing activities	(3,387)
Financing activities
Accrued purchase price paid to sellers	0
Net payments on debt	0
Distribution to parent	3,387
Net cash used in financing activities	3,387
Net change in cash and cash equivalents	0	0
Beginning cash and cash equivalents	0	0
Ending cash and cash equivalents	$ 0	$ 0