Condensed Consolidating Financial Statements (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 24, 2013	Dec. 25, 2012
Assets
Current assets	$ 79,699	$ 68,786
Facilities and equipment, net	155,552	143,625
Franchise rights, net	620,953	619,463
Goodwill	292,230	290,502
Investment in subsidiary
Other assets, net	45,912	44,235
Total assets	1,196,744	1,169,782
Liabilities and member’s equity
Current liabilities	102,636	89,743
Long-term debt	556,562	558,125
Other liabilities and deferred items	61,393	68,153
Deferred income taxes	216,788	218,290
Member’s equity	259,365	235,471
Total liabilities and member’s equity	1,196,744	1,169,782
Parent Guarantor: Holdings [Member]
Assets
Current assets
Facilities and equipment, net
Goodwill
Investment in subsidiary	259,365	235,471
Other assets, net
Total assets	259,365	235,471
Liabilities and member’s equity
Current liabilities
Long-term debt
Other liabilities and deferred items
Deferred income taxes		0
Member’s equity	259,365	235,471
Total liabilities and member’s equity	259,365	235,471
Subsidiary Issuer: NPC [Member]
Assets
Current assets	75,605	68,786
Facilities and equipment, net	148,055	143,625
Goodwill	290,502	290,502
Investment in subsidiary	21,557
Other assets, net	44,203	44,235
Total assets	1,191,534	1,169,782
Liabilities and member’s equity
Current liabilities	98,858	89,743
Long-term debt	556,562	558,125
Other liabilities and deferred items	59,639	68,153
Deferred income taxes	216,793	218,290
Member’s equity	259,682	235,471
Total liabilities and member’s equity	1,191,534	1,169,782
Subsidiary Co-Issuer: NPC Op Co A [Member]
Assets
Current assets	4,094
Facilities and equipment, net	7,497
Goodwill	1,728
Investment in subsidiary
Other assets, net	1,709
Total assets	26,767
Liabilities and member’s equity
Current liabilities	3,778
Long-term debt	0
Other liabilities and deferred items	1,754
Deferred income taxes	(5)
Member’s equity	21,240
Total liabilities and member’s equity	26,767
Subsidiary Co-Issuer: NPC Op Co B [Member]
Assets
Current assets
Facilities and equipment, net
Goodwill
Investment in subsidiary
Other assets, net
Total assets
Liabilities and member’s equity
Current liabilities
Long-term debt
Other liabilities and deferred items
Deferred income taxes
Member’s equity
Total liabilities and member’s equity
Eliminations [Member]
Assets
Current assets
Facilities and equipment, net
Goodwill
Investment in subsidiary	(280,922)	(235,471)
Other assets, net
Total assets	(280,922)	(235,471)
Liabilities and member’s equity
Current liabilities
Long-term debt
Other liabilities and deferred items
Deferred income taxes
Member’s equity	(280,922)	(235,471)
Total liabilities and member’s equity	(280,922)	(235,471)
Franchise Rights [Member]
Assets
Franchise rights, net	623,351	622,634
Franchise Rights [Member] | Parent Guarantor: Holdings [Member]
Assets
Franchise rights, net
Franchise Rights [Member] | Subsidiary Issuer: NPC [Member]
Assets
Franchise rights, net	611,612	622,634
Franchise Rights [Member] | Subsidiary Co-Issuer: NPC Op Co A [Member]
Assets
Franchise rights, net	11,739
Franchise Rights [Member] | Subsidiary Co-Issuer: NPC Op Co B [Member]
Assets
Franchise rights, net
Franchise Rights [Member] | Eliminations [Member]
Assets
Franchise rights, net