XML 46 R57.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Marketable Securities by Asset Type (Detail) (USD $) In Thousands, unless otherwise specified | May 31, 2014 | May 31, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | $ 129,660 | $ 105,483
Available-for-Sale Securities, Gross Unrealized Gains | 14,645 | 8,644
Available-for-Sale Securities, Gross Unrealized Losses | (1,425) | (1,034)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 142,880 | 113,093
Equity securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 106,838 | 83,094
Available-for-Sale Securities, Gross Unrealized Gains | 14,223 | 8,089
Available-for-Sale Securities, Gross Unrealized Losses | (1,261) | (891)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 119,800 | 90,292
Equity securities | Stocks | Foreign |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 984 | 1,090
Available-for-Sale Securities, Gross Unrealized Gains | 669 | 244
Available-for-Sale Securities, Gross Unrealized Losses | (20) |
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 1,633 | 1,334
Equity securities | Stocks | Domestic |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 31,071 | 24,492
Available-for-Sale Securities, Gross Unrealized Gains | 8,965 | 5,265
Available-for-Sale Securities, Gross Unrealized Losses | (132) | (392)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 39,904 | 29,365
Equity securities | Mutual funds | Foreign |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 30,541 | 18,328
Available-for-Sale Securities, Gross Unrealized Gains | 2,799 | 1,901
Available-for-Sale Securities, Gross Unrealized Losses |  | (7)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 33,340 | 20,222
Equity securities | Mutual funds | Domestic |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 44,242 | 39,184
Available-for-Sale Securities, Gross Unrealized Gains | 1,790 | 679
Available-for-Sale Securities, Gross Unrealized Losses | (1,109) | (492)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 44,923 | 39,371
Fixed maturity |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 22,822 | 22,389
Available-for-Sale Securities, Gross Unrealized Gains | 422 | 555
Available-for-Sale Securities, Gross Unrealized Losses | (164) | (143)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 23,080 | 22,801
Fixed maturity | U.S. Treasury and other government |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 21,156 | 20,528
Available-for-Sale Securities, Gross Unrealized Gains | 152 | 247
Available-for-Sale Securities, Gross Unrealized Losses | (164) | (139)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 21,144 | 20,636
Fixed maturity | Corporate bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 1,544 | 1,724
Available-for-Sale Securities, Gross Unrealized Gains | 212 | 244
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 1,756 | 1,968
Fixed maturity | Foreign bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 37 | 37
Available-for-Sale Securities, Gross Unrealized Gains | 3 | 4
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 40 | 41
Fixed maturity | Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 85 | 100
Available-for-Sale Securities, Gross Unrealized Gains | 55 | 60
Available-for-Sale Securities, Gross Unrealized Losses |  | (4)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | $ 140 | $ 156

X
- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. + References No definition available. + Details
Name: | rpm_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
Namespace Prefix: | rpm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. + References No definition available. + Details
Name: | rpm_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Namespace Prefix: | rpm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration