XML 63 R51.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stock Repurchase Program - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2015 | Feb. 28, 2014 | Feb. 28, 2015 | Feb. 28, 2014
Stock Repurchase Programs [Line Items] |  |  |  |
Authorization of stock repurchase program |  |  | Jan. 08, 2008 |
Shares repurchased | 550,000 rpm_RepurchaseOfCommonStockShares |  |  |
Shares repurchased, value | $ 25,800 us-gaap_StockRepurchasedDuringPeriodValue | $ 28 us-gaap_StockRepurchasedDuringPeriodValue | $ 27,588 us-gaap_StockRepurchasedDuringPeriodValue | $ 6,895 us-gaap_StockRepurchasedDuringPeriodValue
Minimum |  |  |  |
Stock Repurchase Programs [Line Items] |  |  |  |
Shares authorized to be repurchased, per year | 1,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 1,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum |  |  |  |
Stock Repurchase Programs [Line Items] |  |  |  |
Shares authorized to be repurchased, per year | 2,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 2,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_RangeAxis = us-gaap_MaximumMember |

X
- Definition Repurchase of Common Stock, Shares + References No definition available. + Details
Name: | rpm_RepurchaseOfCommonStockShares
Namespace Prefix: | rpm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares Repurchased Authorization Date + References No definition available. + Details
Name: | rpm_SharesRepurchasedAuthorizationDate
Namespace Prefix: | rpm_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | rpm_StockRepurchaseProgramsLineItems
Namespace Prefix: | rpm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |