EMPLOYEE BENEFIT PLANS - Benefit obligations, Fair Value and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Employee benefit plans
Accumulated benefit obligation	$ 189,149	$ 195,600
Pension Benefits
Net periodic benefit expense (income):
Interest cost	7,140	6,803	$ 7,990
Expected return on plan assets	(8,401)	(9,639)	(9,959)
Recognition of net actuarial loss (gain)	6,286	6,791	3,774
Net periodic benefit expense (income)	5,025	3,955	1,805
Other changes in plan assets and benefit obligations recognized in OCI, before taxes:
Actuarial net loss (gain)	569	(562)	33,261
Recognition of net actuarial (loss) gain	(6,286)	(6,791)	(3,774)
Total recognized in OCI, before taxes	(5,717)	(7,353)	29,487
Total recognized in net periodic cost and OCI, before taxes	(692)	(3,398)	31,292
Estimated amount that will be amortized from AOCI to net periodic cost
Net actuarial loss (gain)	5,628
Postretirement Benefit Plan
Net periodic benefit expense (income):
Interest cost	62	63	89
Recognition of net actuarial loss (gain)	(431)	(426)	(519)
Net periodic benefit expense (income)	(369)	(363)	(430)
Other changes in plan assets and benefit obligations recognized in OCI, before taxes:
Actuarial net loss (gain)	(122)	(302)	(49)
Recognition of net actuarial (loss) gain	431	426	519
Total recognized in OCI, before taxes	309	124	470
Total recognized in net periodic cost and OCI, before taxes	(60)	$ (239)	$ 40
Estimated amount that will be amortized from AOCI to net periodic cost
Net actuarial loss (gain)	$ (493)