Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Details

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Period Type:	duration

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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- Definition

Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities.

+ References

No definition available.

+ Details

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

- Definition

Cumulative distributions from an equity method investee in excess of the entity's investment balance in the investee.

+ References

No definition available.

+ Details

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- Definition

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element includes distributions that constitute a return of investment, which are classified as investing activities.

+ References

No definition available.

+ Details

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Investments in Unconsolidated Affiliates - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2014 WAVE	May 31, 2013 WAVE	Feb. 28, 2014 ClarkDietrich	Feb. 28, 2014 Joint Venture Transactions TWB	Jul. 31, 2013 Joint Venture Transactions TWB	Feb. 28, 2014 Joint Venture Transactions WAVE	Feb. 28, 2014 Joint Venture Transactions ArtiFlex	Feb. 28, 2014 Joint Venture Transactions ClarkDietrich	Feb. 28, 2014 Joint Venture Transactions Samuel Steel Pickling Company	Feb. 28, 2014 Joint Venture Transactions Seviacero	Feb. 28, 2014 Joint Venture Transactions Worthington Modern Steel Framing Manufacturing Co., Ltd.	Feb. 28, 2014 Joint Venture Transactions Worthington Specialty Processing	Oct. 18, 2013 Joint Venture Transactions Zhejiang Nisshin Worthington Precision Specialty Steel Co	Oct. 18, 2013 Joint Venture Transactions Zhejiang Nisshin Worthington Precision Specialty Steel Co Maximum
Investments in and Advances to Affiliates [Line Items]
Percent of interest by unconsolidated affiliates							50.00%	50.00%	25.00%	31.25%	50.00%	40.00%	51.00%	10.00%	34.00%
Percentage of additional interest acquired by the company					10.00%	10.00%
Percent of controlling interest by the company					55.00%	55.00%
Distributions from unconsolidated affiliates	$ 70,073,000
Cumulative distributions in excess of investment		62,387,000	63,187,000
Excess distributions from unconsolidated affiliates	$ 9,223,000			$ 9,223,000