Summary of Significant Accounting Policies (New Accounting Pronouncements) (Details) - USD ($) $ in Thousands	May 02, 2020	Feb. 01, 2020	May 04, 2019	Feb. 03, 2019	Feb. 02, 2019
Significant Accounting Policies [Line Items]
Assets	$ 1,932,725	$ 1,958,661	$ 1,592,276
Prepaid expenses and other current assets	54,560	75,903	47,167
Total current assets	573,030	665,713	605,774
Operating lease assets	867,295	842,988	659,155
Other accrued expenses	85,377	81,255	72,416
Total current liabilities	363,787	351,345	320,875
Deferred rent and other	(1,678)	(1,199)	0
Long-term operating lease liabilities	877,495	837,623	635,402
Total liabilities	1,242,960	1,198,883	956,277
Total shareholders’ equity	689,765	759,778	635,999		$ 615,094
Total liabilities and shareholders' equity (deficit)	$ 1,932,725	$ 1,958,661	$ 1,592,276
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Assets				$ 618,000