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Quarterly Financial Data (Unaudited) (Schedule of Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 02, 2020	Nov. 03, 2019	Aug. 04, 2019	May 05, 2019	Feb. 03, 2019	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Feb. 02, 2020	Feb. 03, 2019	Jan. 28, 2018
Quarterly Financial Data (Unaudited) [Abstract]
Net sales	$ 259,649	$ 119,768	$ 121,963	$ 114,244	$ 250,541	$ 106,701	$ 110,653	$ 100,207	$ 615,624	$ 568,102	$ 471,447
% of Net Sales, Net sales	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%
Gross profit	$ 137,062	$ 65,365	$ 64,804	$ 60,918	$ 131,251	$ 60,971	$ 62,240	$ 55,940	328,149	310,402	261,019
% of Net Sales, Gross profit	52.80%	54.60%	53.10%	53.30%	52.40%	57.10%	56.20%	55.80%
Operating income (loss)	$ 33,149	$ 1,328	$ 3,735	$ (10,104)	$ 30,105	$ (2,563)	$ 9,896	$ (257)	28,108	37,181	37,072
% of Net Sales, Operating income (loss)	12.80%	1.10%	3.10%	(8.80%)	12.00%	(2.40%)	8.90%	(0.30%)
Net income (loss) attributable to controlling interest	$ 24,375	$ 182	$ 1,936	$ (7,572)	$ 20,620	$ (3,150)	$ 6,377	$ (691)	$ 18,921	$ 23,156	$ 23,351
% of Net Sales, Net income (loss) attributable to controlling interest	9.40%	0.20%	1.60%	(6.60%)	8.20%	(3.00%)	5.80%	(0.70%)
Basic earnings (loss) per share attributable to controlling interest (Class A and Class B)	$ 0.75	$ 0.01	$ 0.06	$ (0.23)	$ 0.64	$ (0.10)	$ 0.20	$ (0.02)
Diluted earnings (loss) per share attributable to controlling interest (Class A and Class B)	$ 0.75	$ 0.01	$ 0.06	$ (0.23)	$ 0.64	$ (0.10)	$ 0.20	$ (0.02)

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