Condensed Consolidating Financial Statements (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 25, 2013	Dec. 25, 2012
Assets
Current assets	$ 103,436	$ 68,786
Facilities and equipment, net	145,461	143,625
Franchise rights, net	612,725	619,463
Goodwill	290,502	290,502
Investment in subsidiary
Other assets, net	44,563	44,235
Total assets	1,199,224	1,169,782
Liabilities and member’s equity
Current liabilities	107,273	89,743
Long-term debt	557,500	558,125
Other liabilities and deferred items	58,787	68,153
Deferred income taxes	218,861	218,290
Member’s equity	256,803	235,471
Total liabilities and member’s equity	1,199,224	1,169,782
Parent Guarantor: Holdings [Member]
Assets
Current assets	0
Facilities and equipment, net	0
Goodwill	0
Investment in subsidiary	256,803	235,471
Other assets, net	0
Total assets	256,803	235,471
Liabilities and member’s equity
Current liabilities	0
Long-term debt	0
Other liabilities and deferred items	0
Deferred income taxes	0	0
Member’s equity	256,803	235,471
Total liabilities and member’s equity	256,803	235,471
Subsidiary Issuer: NPC [Member]
Assets
Current assets	103,436	68,786
Facilities and equipment, net	145,461	143,625
Goodwill	290,502	290,502
Investment in subsidiary	0
Other assets, net	44,563	44,235
Total assets	1,199,224	1,169,782
Liabilities and member’s equity
Current liabilities	107,273	89,743
Long-term debt	557,500	558,125
Other liabilities and deferred items	58,787	68,153
Deferred income taxes	218,861	218,290
Member’s equity	256,803	235,471
Total liabilities and member’s equity	1,199,224	1,169,782
Subsidiary Co-Issuer: NPC Op Co A [Member]
Assets
Current assets	0
Facilities and equipment, net	0
Goodwill	0
Investment in subsidiary
Other assets, net	0
Total assets
Liabilities and member’s equity
Current liabilities	0
Long-term debt	0
Other liabilities and deferred items	0
Deferred income taxes	0
Member’s equity
Total liabilities and member’s equity	0
Subsidiary Co-Issuer: NPC Op Co B [Member]
Assets
Current assets	0
Facilities and equipment, net	0
Goodwill	0
Investment in subsidiary
Other assets, net	0
Total assets
Liabilities and member’s equity
Current liabilities	0
Long-term debt	0
Other liabilities and deferred items	0
Deferred income taxes	0
Member’s equity
Total liabilities and member’s equity
Eliminations [Member]
Assets
Current assets	0
Facilities and equipment, net	0
Goodwill	0
Investment in subsidiary	(256,803)	(235,471)
Other assets, net	0
Total assets	(256,803)	(235,471)
Liabilities and member’s equity
Current liabilities	0
Long-term debt	0
Other liabilities and deferred items	0
Deferred income taxes	0
Member’s equity	(256,803)	(235,471)
Total liabilities and member’s equity	(256,803)	(235,471)
Franchise Rights [Member]
Assets
Franchise rights, net	615,262	622,634
Franchise Rights [Member] | Parent Guarantor: Holdings [Member]
Assets
Franchise rights, net	0
Franchise Rights [Member] | Subsidiary Issuer: NPC [Member]
Assets
Franchise rights, net	615,262	622,634
Franchise Rights [Member] | Subsidiary Co-Issuer: NPC Op Co A [Member]
Assets
Franchise rights, net	0
Franchise Rights [Member] | Subsidiary Co-Issuer: NPC Op Co B [Member]
Assets
Franchise rights, net	0
Franchise Rights [Member] | Eliminations [Member]
Assets
Franchise rights, net	$ 0