Long-Term Debt (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended		12 Months Ended
	Dec. 31, 2012	Jun. 30, 2011 numberofbanks	Mar. 30, 2013	Mar. 31, 1995 acre	Dec. 29, 2012 numberofbanks	Mar. 31, 2012
Long Term Debt (Textual) [Abstract]
Revolving credit facility agreement term		5 years
Revolving credit facility agreement	$ 250	$ 175
Revolving credit facility agreement, number of participating banks		7			6
Provision allowing to expand the amount of overall facility	75	75
Revolving credit facility agreement committed sum outstanding			127.2
Line of credit sub-facility for issuing standby letters of credit			40
Percentage of face amount of standby letter of credit payable as fees			1.125%
Letters of credit outstanding			19.7
Carrying amount of long-term debt (including current portion)			127.8			5.7
Fair value of long-term debt (including current portion)			127.8			5.6
The total amount financed for properties with capital leases and financing obligations			63.8
Acres of land purchased				12.7
Amount of land purchased				$ 0.7
Percentage of land purchased via a non-interest mortgage				100.00%
Period of non-interest bearing mortgage				20 years