Credit Facilities (Details) (USD $)	0 Months Ended	3 Months Ended
	Mar. 20, 2012	Apr. 29, 2012 D
Debt Instrument, Face Amount	$ 350,000,000
Debt issuance cost	8,900,000
Percent of excess cash flow		50.00%
Period after last day for fiscal year 2013 to make earliest payment, days		95
Term A Loans [Member]
Debt Instrument, Face Amount	100,000,000
Long-term Debt	99,500,000
Debt issuance cost	500,000
Fair value of term loans		99,500,000
Debt Instrument, Periodic Principal Payment	5,000,000
Debt Instrument, Interest Rate at Period End		2.99%
Term B Loans [Member]
Debt Instrument, Face Amount	250,000,000
Long-term Debt	247,500,000
Debt issuance cost	2,500,000
Fair value of term loans		247,500,000
Debt Instrument, Periodic Principal Payment	625,000
Debt Instrument, Interest Rate at Period End		4.25%
Minimum [Member]
Interest coverage ratio		5.00
Maximum [Member]
Total leverage ratio		2.65
Maximum [Member] | Additional Term Loan Facilities [Member]
Debt Instrument, Face Amount	$ 150,000,000
Federal Funds [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Base Rate [Member] | Term B Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Debt Instrument, Basis Spread on Variable Rate Floor	2.00%
Base Rate [Member] | Minimum [Member] | Term A Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Base Rate [Member] | Maximum [Member] | Term A Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%
LIBOR [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
LIBOR [Member] | Term B Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	3.25%
Debt Instrument, Basis Spread on Variable Rate Floor	1.00%
LIBOR [Member] | Minimum [Member] | Term A Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
LIBOR [Member] | Maximum [Member] | Term A Loans [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%