Condensed Consolidating Financial Statements (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 25, 2013	Jun. 26, 2012
Operating activities
Net cash flows provided by operating activities	$ 66,792	$ 53,160
Investing activities
Capital expenditures	(22,102)	(16,040)
Purchase of the stock of the Company	0	(436,081)
Purchase of business assets, net of cash acquired	0	(19,371)
Proceeds from sale or disposition of assets	540	24
Net cash used in investing activities	(21,562)	(471,468)
Financing activities
Retirement of predecessor entity debt and other obligations	0	(372,700)
Proceeds from equity contributions, net	0	216,635
Issuance of debt	0	565,000
Debt issue costs	(91)	(31,905)
Interest rate derivative	0	(636)
Net cash (used in) provided by financing activities	(2,938)	376,394
Net change in cash and cash equivalents	42,292	(41,914)
Beginning cash and cash equivalents	25,493	78,394
Ending cash and cash equivalents	67,785	36,480
Parent Guarantor: Holdings [Member]
Operating activities
Net cash flows provided by operating activities
Investing activities
Capital expenditures
Purchase of the stock of the Company		(216,635)
Purchase of business assets, net of cash acquired
Proceeds from sale or disposition of assets
Net cash used in investing activities		(216,635)
Financing activities
Retirement of predecessor entity debt and other obligations
Proceeds from equity contributions, net		216,635
Issuance of debt
Debt issue costs
Interest rate derivative
Net cash (used in) provided by financing activities		216,635
Net change in cash and cash equivalents
Beginning cash and cash equivalents
Ending cash and cash equivalents
Subsidiary Issuer: NPC [Member]
Operating activities
Net cash flows provided by operating activities	66,792	53,160
Investing activities
Capital expenditures	(22,102)	(16,040)
Purchase of the stock of the Company		(436,081)
Purchase of business assets, net of cash acquired		(19,371)
Proceeds from sale or disposition of assets	540	24
Net cash used in investing activities	(21,562)	(471,468)
Financing activities
Retirement of predecessor entity debt and other obligations		(372,700)
Proceeds from equity contributions, net		216,635
Issuance of debt		565,000
Debt issue costs		(31,905)
Interest rate derivative		(636)
Net cash (used in) provided by financing activities	(2,938)	376,394
Net change in cash and cash equivalents	42,292	(41,914)
Beginning cash and cash equivalents	25,493	78,394
Ending cash and cash equivalents	67,785	36,480
Subsidiary Co-Issuer: NPC Op Co A [Member]
Operating activities
Net cash flows provided by operating activities
Investing activities
Capital expenditures
Purchase of the stock of the Company
Purchase of business assets, net of cash acquired
Proceeds from sale or disposition of assets
Net cash used in investing activities
Financing activities
Retirement of predecessor entity debt and other obligations
Proceeds from equity contributions, net
Issuance of debt
Debt issue costs
Interest rate derivative
Net cash (used in) provided by financing activities
Net change in cash and cash equivalents
Beginning cash and cash equivalents
Ending cash and cash equivalents
Subsidiary Co-Issuer: NPC Op Co B [Member]
Operating activities
Net cash flows provided by operating activities
Investing activities
Capital expenditures
Purchase of the stock of the Company
Purchase of business assets, net of cash acquired
Proceeds from sale or disposition of assets
Net cash used in investing activities
Financing activities
Retirement of predecessor entity debt and other obligations
Proceeds from equity contributions, net
Issuance of debt
Debt issue costs
Interest rate derivative
Net cash (used in) provided by financing activities
Net change in cash and cash equivalents
Beginning cash and cash equivalents
Ending cash and cash equivalents
Eliminations [Member]
Operating activities
Net cash flows provided by operating activities
Investing activities
Capital expenditures
Purchase of the stock of the Company		216,635
Purchase of business assets, net of cash acquired
Proceeds from sale or disposition of assets
Net cash used in investing activities		216,635
Financing activities
Retirement of predecessor entity debt and other obligations
Proceeds from equity contributions, net		(216,635)
Issuance of debt
Debt issue costs
Interest rate derivative
Net cash (used in) provided by financing activities		(216,635)
Net change in cash and cash equivalents
Beginning cash and cash equivalents
Ending cash and cash equivalents