Loss per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended
	May 01, 2019	Apr. 30, 2019	May 04, 2019	May 05, 2018
Earnings Per Share [Abstract]
Net loss attributable to Guess, Inc.			$ (21,374)	$ (21,221)
Less net earnings attributable to nonvested restricted stockholders			161	198
Net loss attributable to common stockholders			$ (21,535)	$ (21,419)
Weighted average common shares used in basic computations (in shares)			79,925,000	79,901,000
Effect of dilutive securities:
Stock options and restricted stock units (in shares)			0	0
Weighted average common shares used in diluted computations (in shares)			79,925,000	79,901,000
Net loss per common share attributable to common stockholders:
Basic (in dollars per share)			$ (0.27)	$ (0.27)
Diluted (in dollars per share)			$ (0.27)	$ (0.27)
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)			2,137,004	2,895,494
Conversion price of convertible senior notes (in dollars per share)	$ 46.88	$ 25.78	$ 25.78
Warrants outstanding (in shares)		11,600,000.0	11,600,000
Strike price of warrants (in dollars per share)		$ 46.88	$ 46.88
Potentially dilutive shares
Antidilutive securities excluded from computation of earnings (loss) per share
Antidilutive equity awards excluded from computation of diluted weighted average common shares (in shares)			1,052,518	1,077,017
Performance-based units
Antidilutive securities excluded from computation of earnings (loss) per share
Performance or market awards excluded from computation of EPS (in shares)			1,075,085	871,904