XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.26.1

Fair Value Measurements (Details) - Fair Value, Recurring - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Financial assets: |  |
Total financial assets | $ 24.5 | $ 23.2
Financial liabilities: |  |
Deferred compensation programs' liabilities | 7.3 | 6.7
Total financial liabilities | 7.3 | 6.7
Corporate bonds |  |
Financial assets: |  |
Trading debt securities: | 3.5 | 3.6
Agency bonds |  |
Financial assets: |  |
Trading debt securities: | 0.9 | 0.9
U.S. government securities |  |
Financial assets: |  |
Trading debt securities: | 3.7 | 2.4
Agency collateralized mortgage obligations |  |
Financial assets: |  |
Trading debt securities: | 8.4 | 8.5
Exchange traded funds |  |
Financial assets: |  |
Trading debt securities: | 0.4 | 0.4
Mortgage backed securities |  |
Financial assets: |  |
Trading debt securities: | 0.3 | 0.3
Other |  |
Financial assets: |  |
Trading debt securities: | 0.2 | 0.3
Preferred stocks |  |
Financial assets: |  |
Trading equity securities: | 0.3 | 0.3
Equity Funds |  |
Financial assets: |  |
Trading equity securities: | 0.6 | 0.6
Supplemental Employee Retirement Plan and Non-Qualified Deferred Compensation Plan | Mutual Fund |  |
Financial assets: |  |
Trading equity securities: | 6.2 | 5.9
Level 1 |  |
Financial assets: |  |
Total financial assets | 14.7 | 13.2
Financial liabilities: |  |
Deferred compensation programs' liabilities | 0.0 | 0.0
Total financial liabilities | 0.0 | 0.0
Level 1 | Corporate bonds |  |
Financial assets: |  |
Trading debt securities: | 3.5 | 3.6
Level 1 | Agency bonds |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 1 | U.S. government securities |  |
Financial assets: |  |
Trading debt securities: | 3.7 | 2.4
Level 1 | Agency collateralized mortgage obligations |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 1 | Exchange traded funds |  |
Financial assets: |  |
Trading debt securities: | 0.4 | 0.4
Level 1 | Mortgage backed securities |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 1 | Other |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 1 | Preferred stocks |  |
Financial assets: |  |
Trading equity securities: | 0.3 | 0.3
Level 1 | Equity Funds |  |
Financial assets: |  |
Trading equity securities: | 0.6 | 0.6
Level 1 | Supplemental Employee Retirement Plan and Non-Qualified Deferred Compensation Plan | Mutual Fund |  |
Financial assets: |  |
Trading equity securities: | 6.2 | 5.9
Level 2 |  |
Financial assets: |  |
Total financial assets | 9.8 | 10.0
Financial liabilities: |  |
Deferred compensation programs' liabilities | 7.3 | 6.7
Total financial liabilities | 7.3 | 6.7
Level 2 | Corporate bonds |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 2 | Agency bonds |  |
Financial assets: |  |
Trading debt securities: | 0.9 | 0.9
Level 2 | U.S. government securities |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 2 | Agency collateralized mortgage obligations |  |
Financial assets: |  |
Trading debt securities: | 8.4 | 8.5
Level 2 | Exchange traded funds |  |
Financial assets: |  |
Trading debt securities: | 0.0 | 0.0
Level 2 | Mortgage backed securities |  |
Financial assets: |  |
Trading debt securities: | 0.3 | 0.3
Level 2 | Other |  |
Financial assets: |  |
Trading debt securities: | 0.2 | 0.3
Level 2 | Preferred stocks |  |
Financial assets: |  |
Trading equity securities: | 0.0 | 0.0
Level 2 | Equity Funds |  |
Financial assets: |  |
Trading equity securities: | 0.0 | 0.0
Level 2 | Supplemental Employee Retirement Plan and Non-Qualified Deferred Compensation Plan | Mutual Fund |  |
Financial assets: |  |
Trading equity securities: | $ 0.0 | $ 0.0

X
- Definition Obligations of the Company associated with the financial assets held in the supplemental executive retirement plan (SERP). + References No definition available. + Details
Name: | aste_SerpLiabilitiesFairValueDisclosure
Namespace Prefix: | aste_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 + Details
Name: | us-gaap_TradingSecuritiesDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AgencySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ExchangeTradedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=aste_SupplementalEmployeeRetirementPlanAndNonQualifiedDeferredCompensationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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: |