Credit Facilities - Narrative (Details) (USD $)	0 Months Ended		0 Months Ended		0 Months Ended		12 Months Ended
	Mar. 20, 2012	May 02, 2013	Mar. 20, 2012 Term A loans	Jan. 27, 2013 Term A loans	Mar. 20, 2012 Term B loans	Jan. 27, 2013 Term B loans	Jan. 27, 2013 Minimum	Jan. 27, 2013 Maximum	Mar. 20, 2012 Maximum Additional term loan facilities	Mar. 20, 2012 Federal funds	Mar. 20, 2012 LIBOR	Jan. 27, 2013 LIBOR Term B loans	Mar. 20, 2012 LIBOR Term B loans	Mar. 20, 2012 LIBOR Minimum Term A loans	Mar. 20, 2012 LIBOR Maximum Term A loans	Jan. 27, 2013 Base rate Term B loans	Mar. 20, 2012 Base rate Term B loans	Mar. 20, 2012 Base rate Minimum Term A loans	Mar. 20, 2012 Base rate Maximum Term A loans
Debt instrument, face amount	$ 350,000,000		$ 100,000,000		$ 250,000,000				$ 150,000,000
Long-term debt (net of original issuance discount)			99,500,000		247,500,000
Original issue discount on debt			500,000		2,500,000
Debt issuance cost	8,900,000
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%	1.00%	3.25%		2.50%	2.75%	2.25%		1.50%	1.75%
Basis spread on variable rate floor													1.00%				2.00%
Interest rate at period end				2.96%		4.25%
Minimum percentage of debt protected by hedging agreement	50.00%
Periodic principal payment			5,000,000		600,000
Percent of excess cash flow	50.00%
Potential early debt payment, first excess cash flow payment		$ 26,600,000
Period after last day of fiscal year 2013 to make earliest payment	95 days
Interest coverage ratio							5.00
Total leverage ratio								2.65