LONG-TERM DEBT (Details) (USD $)		0 Months Ended				3 Months Ended			0 Months Ended
	Jun. 29, 2013	Dec. 19, 2012 Credit Agreement Wells Fargo Bank	Jun. 29, 2013 Credit Agreement Wells Fargo Bank	Jun. 29, 2013 Revolving Line of Credit Wells Fargo Bank	Dec. 19, 2012 Revolving Line of Credit Wells Fargo Bank	Jun. 29, 2013 Revolving Line of Credit Wells Fargo Bank Minimum	Jun. 29, 2013 Revolving Line of Credit Wells Fargo Bank Maximum	Aug. 09, 2013 Secured term loan facility Subsequent event Interest rate swap Cash flow	Jun. 28, 2013 Secured term loan facility Wells Fargo Bank	Jun. 29, 2013 Secured term loan facility Wells Fargo Bank	Apr. 29, 2013 Secured term loan facility Wells Fargo Bank	Dec. 19, 2012 Secured term loan facility Wells Fargo Bank	Jun. 29, 2013 Letters of credit related to the workers' compensation insurances policies
Long-term debt
Maximum borrowing capacity		$ 45,000,000			$ 35,000,000							$ 10,000,000
Term of credit agreement		5 years
Unused credit capacity under the agreement			29,700,000
Interest rate (as a percent)			2.09%
Amount designed to maintain cash balances under cash management system and revolving credit facility				0
Checks outstanding in excess of bank balances	2,400,000
Outstanding amount				0
Quarterly commitment fee (as a percent)						0.20%	0.50%
Principal amount of debt											10,000,000
Principal amount payable in quarterly installments									166,667
Outstanding amount										9,800,000
Notional amount								5,000,000
Fixed interest rate (as a percent)								3.10%
Maximum borrowing capacity													$ 3,100,000