Contingent Liabilities and Commitments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended	45 Months Ended
May 31, 2015	May 31, 2017
Commitment And Contingencies [Line Items]
Insurance proceeds for replacement value of damaged property and equipment	$ 1,248	$ 13,414
Book value of assets	243
Gain on damaged property and equipment	1,005
Business interruption
Commitment And Contingencies [Line Items]
Insurance proceeds for replacement value of damaged property and equipment		5,521
Other expenses
Commitment And Contingencies [Line Items]
Insurance proceeds for replacement value of damaged property and equipment		$ 1,001
Manufacturing Expense \| Business interruption
Commitment And Contingencies [Line Items]
Insurance proceeds for replacement value of damaged property and equipment	2,653
Manufacturing Expense \| Other expenses
Commitment And Contingencies [Line Items]
Insurance proceeds for replacement value of damaged property and equipment	$ 256

Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

Name:	us-gaap_UnusualOrInfrequentItemInsuranceProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

+ References

+ Details

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

- Definition

Amount, after deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64828382&loc=d3e15138-107781

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 55
-Paragraph 66
-URI http://asc.fasb.org/extlink&oid=75116239&loc=d3e34211-109320

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 40
-Section 25
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68049474&loc=d3e59193-111647

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 40
-Section 25
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=68049474&loc=d3e59170-111647

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 10
-Section 60
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68067471&loc=d3e11642-108343

+ Details

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

- Definition

Commitment And Contingencies [Line Items]

+ References

No definition available.

+ Details

Name:	wor_CommitmentAndContingenciesLineItems
Namespace Prefix:	wor_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=wor_InsuranceClaimsForBusinessInterruptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=wor_InsuranceClaimsForOtherExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=wor_ManufacturingExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: