Condensed Consolidating Financial Statements (Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jul. 01, 2014	Jun. 25, 2013
Operating activities
Net cash flows provided by operating activities	$ 41,283	$ 66,792
Investing activities
Capital expenditures	(35,105)	(22,102)
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	2,373	540
Net cash used in investing activities	(32,732)	(21,562)
Financing activities
Payment of accrued purchase price to sellers	(10,875)	(2,847)
Net payments on debt	(8,665)
Issuance of debt	40,000	0
Distribution to parent	0
Other	(753)
Net cash provided by (used in) financing activities	19,707	(2,938)
Net change in cash and cash equivalents	28,258	42,292
Beginning cash and cash equivalents	20,035	25,493
Ending cash and cash equivalents	48,293	67,785
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
Payment of accrued purchase price to sellers	0
Net payments on debt	0
Issuance of debt	0
Distribution to parent	0
Other	0
Net cash provided by (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	31,824	66,792
Investing activities
Capital expenditures	(32,895)	(22,102)
Return of investment in NPCQB	7,622
Proceeds from sale or disposition of assets	2,351	540
Net cash used in investing activities	(22,922)	(21,562)
Financing activities
Payment of accrued purchase price to sellers	(10,875)
Net payments on debt	(8,665)
Issuance of debt	40,000
Distribution to parent	0
Other	(753)
Net cash provided by (used in) financing activities	19,707	(2,938)
Net change in cash and cash equivalents	28,609	42,292
Beginning cash and cash equivalents	19,170	25,493
Ending cash and cash equivalents	47,779	67,785
Subsidiary Co-Issuer: NPCQB
Operating activities
Net cash flows provided by operating activities	9,459	0
Investing activities
Capital expenditures	(2,210)	0
Return of investment in NPCQB	0
Proceeds from sale or disposition of assets	22	0
Net cash used in investing activities	(2,188)
Financing activities
Payment of accrued purchase price to sellers	0
Net payments on debt	0
Issuance of debt	0
Distribution to parent	(7,622)
Other	0
Net cash provided by (used in) financing activities	(7,622)
Net change in cash and cash equivalents	(351)
Beginning cash and cash equivalents	865	0
Ending cash and cash equivalents	514	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
Payment of accrued purchase price to sellers	0
Net payments on debt	0
Issuance of debt	0
Distribution to parent	0
Other	0
Net cash provided by (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	(7,622)
Proceeds from sale or disposition of assets	0	0
Net cash used in investing activities	(7,622)
Financing activities
Payment of accrued purchase price to sellers	0
Net payments on debt	0
Issuance of debt	0
Distribution to parent	7,622
Other	0
Net cash provided by (used in) financing activities	7,622
Net change in cash and cash equivalents	0	0
Beginning cash and cash equivalents	0	0
Ending cash and cash equivalents	$ 0	$ 0