LONG-TERM BORROWINGS (Details) (USD $)	1 Months Ended	3 Months Ended	1 Months Ended
	Aug. 31, 2014	Feb. 01, 2015	Jan. 31, 2015	Aug. 25, 2013	Apr. 30, 2011	Nov. 02, 2014
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations		$ 139,819,000				$ 142,186,000
Less current portion		10,457,000				10,381,000
Long-term debt and capital lease obligations non current		129,362,000				131,805,000
Credit Facility [Member]
Long-term borrowings [Abstract]
Maturity date of debt	Dec. 31, 2018	Dec. 31, 2018
Available borrowing capacity	50,000,000	50,000,000
Maximum borrowing capacity	75,000,000	75,000,000
Amount outstanding under credit facility		0
Current borrowing capacity		50,000,000
Variable interest rate (in hundredths)		1.69%
3.25% convertible senior notes due on April 1, 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations		57,500,000				115,000,000
Interest rate percentage (in hundredths)		3.25%
Maturity date of debt		Apr. 01, 2016
3.25 convertible senior notes due on April 2019 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations		57,500,000				0
Interest rate percentage (in hundredths)		3.25%
Maturity date of debt		Apr. 01, 2019
Number of shares each note is convertible to (in shares)			96
Face amount of each note converted			1,000
Conversion price per share (in dollars per share)			$ 10.37
2.77% capital lease obligation payable through July 2018 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations		19,211,000				20,481,000
Interest rate percentage (in hundredths)		2.77%
Maturity date of debt		Jul. 31, 2018
Original face amount of debt				26,400,000
Repayment period of debt				5 years
Periodic payments				500,000
Frequency of periodic payment				per month
Amount payable through the end of lease term		20,200,000
Interest included in lease payments		1,000,000
3.09% capital lease obligation payable through March 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations		5,608,000				6,705,000
Interest rate percentage (in hundredths)		3.09%
Maturity date of debt		Mar. 30, 2016
Original face amount of debt					21,200,000
Repayment period of debt					5 years
Periodic payments					400,000
Frequency of periodic payment					per month
Amount payable through the end of lease term		5,700,000
Interest included in lease payments		$ 100,000