EMPLOYEE BENEFIT PLANS - Benefit obligations, Fair Value and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Employee benefit plans
Accumulated benefit obligation	$ 195,600	$ 220,537
Pension Plans
Net periodic benefit expense (income):
Interest cost	6,803	7,990	$ 7,993
Expected return on plan assets	(9,639)	(9,959)	(8,942)
Recognition of net actuarial loss (gain)	6,791	3,774	6,566
Net periodic benefit expense (income)	3,955	1,805	5,617
Other changes in plan assets and benefit obligations recognized in OCI before taxes:
Actuarial net (gain) loss	(562)	33,261	(17,013)
Recognition of net actuarial (loss) gain	(6,791)	(3,774)	(6,566)
Total recognized in OCI before taxes	(7,353)	29,487	(23,579)
Total recognized in net periodic cost and OCI, before taxes	(3,398)	31,292	(17,962)
Estimated amount that will be amortized from AOCI to net periodic cost
Net actuarial loss (gain)	6,286
Postretirement Benefit Plan
Net periodic benefit expense (income):
Interest cost	63	89	122
Recognition of net actuarial loss (gain)	(426)	(519)	(363)
Net periodic benefit expense (income)	(363)	(430)	(241)
Other changes in plan assets and benefit obligations recognized in OCI before taxes:
Actuarial net (gain) loss	(302)	(49)	(1,064)
Recognition of net actuarial (loss) gain	426	519	363
Total recognized in OCI before taxes	124	470	(701)
Total recognized in net periodic cost and OCI, before taxes	(239)	$ 40	$ (942)
Estimated amount that will be amortized from AOCI to net periodic cost
Net actuarial loss (gain)	$ (431)