SHARE-BASED COMPENSATION - RSU Compensation Expense and the Related Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 29, 2022	Jan. 30, 2021	Feb. 01, 2020
SHARE-BASED COMPENSATION
Compensation (income) expense	$ 907	$ (613)	$ (1,756)
Income tax provision (benefit)	(233)	158	452
Compensation (income) expense, net of income tax provision (benefit)	$ 674	$ (455)	$ (1,304)

Amount of tax provision (benefit) for recognition of (Income) expense of award under share-based payment arrangement.

No definition available.

Name:	cal_SharebasedPaymentArrangementIncomeExpenseTaxProvisionBenefit
Namespace Prefix:	cal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration