XML 93 R73.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Note 9 - Pensions and Other Postretirement Benefits - Allocation of Plan Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Plan Fair Value Assets | $ 55,130 | $ 50,649
Fair Value, Inputs, Level 1 [Member] |  |
Plan Fair Value Assets | 36,521 | 28,304
Fair Value, Inputs, Level 2 [Member] |  |
Plan Fair Value Assets | 18,608 | 22,345
Fair Value, Inputs, Level 3 [Member] |  |
Plan Fair Value Assets | 1 | 0
Equity Securities [Member] |  |
Plan Fair Value Assets | 14,262 | 13,660
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Plan Fair Value Assets | 14,262 | 13,660
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Plan Fair Value Assets | 0 | 0
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Plan Fair Value Assets | 0 | 0
Fixed Income Securities [Member] |  |
Plan Fair Value Assets | 29,066 | 27,492
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Plan Fair Value Assets | 10,458 | 8,913
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Plan Fair Value Assets | 18,608 | 18,579
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Plan Fair Value Assets | 0 | 0
Mutual Funds [Member] |  |
Plan Fair Value Assets | 3,529 | 3,684
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Plan Fair Value Assets | 3,529 | 3,684
Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Plan Fair Value Assets | 0 | 0
Mutual Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Plan Fair Value Assets | 0 | 0
Cash and Cash Equivalents [Member] |  |
Plan Fair Value Assets | 8,273 | 5,813
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Plan Fair Value Assets | 8,272 | 2,047
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Plan Fair Value Assets | 0 | 3,766
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Plan Fair Value Assets | $ 1 | $ 0

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=grc_MutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |