- Employee Retirement Benefits (Details) $ in Thousands	12 Months Ended
Jan. 31, 2020 USD ($) contribution_plan	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of defined contribution plans \| contribution_plan	1
Defined contribution current payroll matching percentage	5.00%	5.00%	4.00%
Participant contribution rate for company stock, maximum	10.00%
Total contribution expense	$ 3,696	$ 3,006	$ 2,263
Deferred Compensation liability, current and noncurrent	1,363
Deferred compensation assets held in rabbi trust	$ 1,358
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of Participant balance transferred into Raven common stock	10.00%
Percentage of participant balance allowed in Raven Common stock	10.00%

Defined contribution current payroll matching percentage

No definition available.

Name:	ravn_DefinedContributionCurrentPayrollMatchingPercentage
Namespace Prefix:	ravn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Defined Contribution Plan, Number of Plans

+ References

No definition available.

+ Details

Name:	ravn_DefinedContributionPlanNumberofPlans
Namespace Prefix:	ravn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Participant contribution rate for company stock, maximum

+ References

No definition available.

+ Details

Name:	ravn_Participantcontributionrateforcompanystockmaximum
Namespace Prefix:	ravn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of Participant balance transferred into Raven common stock, Maximum. The maximum percentage of the paricipant's balance in the 401k plan that can be transferred to acquire Raven common stock.

+ References

No definition available.

+ Details

Name:	ravn_PercentageofParticipantbalancetransferredintoRavencommonstock
Namespace Prefix:	ravn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of participant balance allowed in Raven Common stock, Maximum. The maximum percentage of the participants balance in the Company's 401k plan that can be invested in Raven common stock.

+ References

No definition available.

+ Details

Name:	ravn_PercentageofparticipantbalanceallowedinRavenCommonstock
Namespace Prefix:	ravn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The value of a trust established to hold the stock of an employee compensation and benefits plan as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_CompensationAndBenefitsTrust
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: