Credit Facilities (Details) (USD $)	0 Months Ended		0 Months Ended		0 Months Ended		6 Months Ended
	Mar. 20, 2012	Jul. 29, 2012	Mar. 20, 2012 Term A Loans [Member]	Jul. 29, 2012 Term A Loans [Member]	Mar. 20, 2012 Term B Loans [Member]	Jul. 29, 2012 Term B Loans [Member]	Jul. 29, 2012 Minimum [Member]	Jul. 29, 2012 Maximum [Member]	Mar. 20, 2012 Maximum [Member] Additional Term Loan Facilities [Member]	Mar. 20, 2012 Federal Funds [Member]	Jul. 29, 2012 Base Rate [Member] Term B Loans [Member]	Mar. 20, 2012 Base Rate [Member] Term B Loans [Member]	Mar. 20, 2012 Base Rate [Member] Minimum [Member] Term A Loans [Member]	Mar. 20, 2012 Base Rate [Member] Maximum [Member] Term A Loans [Member]	Mar. 20, 2012 LIBOR [Member]	Jul. 29, 2012 LIBOR [Member] Term B Loans [Member]	Mar. 20, 2012 LIBOR [Member] Term B Loans [Member]	Mar. 20, 2012 LIBOR [Member] Minimum [Member] Term A Loans [Member]	Mar. 20, 2012 LIBOR [Member] Maximum [Member] Term A Loans [Member]
Debt instrument, face amount	$ 350,000,000		$ 100,000,000		$ 250,000,000				$ 150,000,000
Long-term debt			99,500,000		247,500,000
Original issue discount on debt			500,000		2,500,000
Debt issuance cost	8,900,000
Fair value of term loans		346,500,000
Description of variable rate basis	(i) LIBOR for interest periods of 1, 2, 3 or 6 months or, subject to certain conditions, 9 or 12 months (“LIBOR”) or (ii) the highest of (a) the prime rate, (b) the federal funds effective rate plus 1/2% and (c) one-month LIBOR plus 1.00% ("Base Rate")
Basis spread on variable rate										0.50%	2.25%		1.50%	1.75%	1.00%	3.25%		2.50%	2.75%
Basis spread on variable rate floor												2.00%					1.00%
Interest rate at period end				2.99%		4.25%
Minimum percentage of debt protected by hedging agreement	50.00%
Periodic principal payment			$ 5,000,000		$ 625,000
Percent of excess cash flow	50.00%
Period after last day of fiscal year 2013 to make earliest payment	95 days
Interest coverage ratio							5.00
Total leverage ratio								2.65