XML 32 R43.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Marketable Securities by Asset Type (Detail) (USD $) In Thousands, unless otherwise specified | Nov. 30, 2012 | May 31, 2012
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | $ 129,132 | $ 117,732
Available-for-Sale Securities, Gross Unrealized Gains | 6,780 | 5,475
Available-for-Sale Securities, Gross Unrealized Losses | (743) | (3,078)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 135,169 | 120,129
Equity securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 92,304 | 82,131
Available-for-Sale Securities, Gross Unrealized Gains | 6,020 | 4,490
Available-for-Sale Securities, Gross Unrealized Losses | (708) | (3,059)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 97,616 | 83,562
Equity securities | Stocks | Foreign |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 1,321 | 1,016
Available-for-Sale Securities, Gross Unrealized Gains | 235 | 79
Available-for-Sale Securities, Gross Unrealized Losses | (12) |
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 1,544 | 1,095
Equity securities | Stocks | Domestic |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 27,639 | 24,380
Available-for-Sale Securities, Gross Unrealized Gains | 2,385 | 2,776
Available-for-Sale Securities, Gross Unrealized Losses | (691) | (1,046)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 29,333 | 26,110
Equity securities | Mutual funds | Foreign |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 20,072 | 17,489
Available-for-Sale Securities, Gross Unrealized Gains | 2,550 | 521
Available-for-Sale Securities, Gross Unrealized Losses |  | (936)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 22,622 | 17,074
Equity securities | Mutual funds | Domestic |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 43,272 | 39,246
Available-for-Sale Securities, Gross Unrealized Gains | 850 | 1,114
Available-for-Sale Securities, Gross Unrealized Losses | (5) | (1,077)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 44,117 | 39,283
Fixed maturity |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 36,828 | 35,601
Available-for-Sale Securities, Gross Unrealized Gains | 760 | 985
Available-for-Sale Securities, Gross Unrealized Losses | (35) | (19)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 37,553 | 36,567
Fixed maturity | U.S. Treasury and other government |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 20,565 | 19,347
Available-for-Sale Securities, Gross Unrealized Gains | 405 | 530
Available-for-Sale Securities, Gross Unrealized Losses | (32) | (12)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 20,938 | 19,865
Fixed maturity | Kemrock convertible bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 14,273 | 13,670
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 14,273 | 13,670
Fixed maturity | Corporate bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 1,824 | 2,305
Available-for-Sale Securities, Gross Unrealized Gains | 286 | 349
Available-for-Sale Securities, Gross Unrealized Losses | (1) | (5)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 2,109 | 2,649
Fixed maturity | Foreign bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 38 | 38
Available-for-Sale Securities, Gross Unrealized Gains | 4 | 1
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | 42 | 39
Fixed maturity | Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-Sale Securities, Amortized Cost | 128 | 241
Available-for-Sale Securities, Gross Unrealized Gains | 65 | 105
Available-for-Sale Securities, Gross Unrealized Losses | (2) | (2)
Available-for-Sale Securities, Fair Value (Net Carrying Amount) | $ 191 | $ 344

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