XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.23.1

Goodwill and Intangible Assets - Schedule of Definite and Indefinite Lived Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Finite-lived intangible assets | $ 231,168 | $ 230,772
Less accumulated amortization | (68,836) | (64,931)
Total net | 162,332 | 165,841
Total Intangible Assets | 167,832 | 171,341
Trade names and trademarks |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Indefinite-lived intangible assets | 5,500 | 5,500
Trade names and trademarks |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Finite-lived intangible assets | 68,971 | 68,797
Customer and dealer relationships |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Finite-lived intangible assets | 129,513 | 129,338
Patents and drawings |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Finite-lived intangible assets | $ 28,484 | 28,437
Favorable leasehold interests |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 7 years |
Finite-lived intangible assets | $ 4,200 | $ 4,200
Minimum | Trade names and trademarks |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 15 years |
Minimum | Customer and dealer relationships |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 8 years |
Minimum | Patents and drawings |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 3 years |
Maximum | Trade names and trademarks |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 25 years |
Maximum | Customer and dealer relationships |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 15 years |
Maximum | Patents and drawings |  |
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by major class [Line Items] |  |
Estimated Useful Lives | 12 years |

X
- Definition [Line Items] for Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Table] + References No definition available. + Details
Name: | alg_ScheduleofAcquiredIndefinitelivedandFiniteIntangibleAssetsbyMajorClassLineItems
Namespace Prefix: | alg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
Name: | us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksAndTradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksAndTradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_IntellectualPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OffMarketFavorableLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |