PROPERTY AND EQUIPMENT - Impairment losses (Details) - CAD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Impairments and other information
Impairment of property and equipment	$ 2,560	$ 3,179	$ 2,560	$ 3,179
Value in use	$ 0	$ 0	$ 0	$ 0
Pre-tax weighted average cost of capital rate	11.90%	13.40%	11.90%	13.40%
U. S.
Impairments and other information
Impairment of property and equipment	$ 189	$ 3,179	$ 189	$ 3,179
U. S. | CGUs
Impairments and other information
Value in use		848		848
Reversal of impairment loss		866		866
Canada
Impairments and other information
Impairment of property and equipment	$ 2,371	$ 0	$ 2,371	$ 0