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Lease Liabilities - Disclosure of Detailed Information About Undiscounted Contractual Maturity of Lease Liabilities (Details) - NZD ($)
$ in Thousands
Jan. 31, 2020
Feb. 02, 2019
Statement Line Items [Line Items]    
Future minimum finance charges $ 28,897  
Less future finance charges (3,066)  
Lease liabilities 25,831 $ 27,899
Within One Year [member]    
Statement Line Items [Line Items]    
Future minimum finance charges 9,409  
2 to 5 years Inclusive [member]    
Statement Line Items [Line Items]    
Future minimum finance charges 19,311  
After 5 Years [member]    
Statement Line Items [Line Items]    
Future minimum finance charges $ 177