XML 66 R55.htm IDEA: XBRL DOCUMENT
v3.20.2

Income Taxes (Narrative) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 01, 2020 | Nov. 01, 2020 | Nov. 03, 2019
Income Taxes [Abstract] |  |  |
Effective tax rate related to controlling interest | 29.00% | 26.00% | 29.00%
Carryback period for net operating losses |  | 5 years |

X
- Definition Carryback Period For Net Operating Losses + References No definition available. + Details
Name: | dlth_CarrybackPeriodForNetOperatingLosses
Namespace Prefix: | dlth_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration