XML 157 R106.htm IDEA: XBRL DOCUMENT v3.25.0.1

EMPLOYEE BENEFIT PLANS - Plan Assets (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	$ 100,942	$ 97,252	$ 92,129
Total other than commingled investment funds measured at net asset value
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	78,881	75,912
Total other than commingled investment funds measured at net asset value | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	78,855	75,883
Total other than commingled investment funds measured at net asset value | Level 2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	26	29
Cash And Cash Equivalents
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	2,243	1,665
Cash And Cash Equivalents | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	2,243	1,665
Consumer discretionary
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,572	2,605
Consumer discretionary | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,572	2,605
Consumer durables
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	2,257	2,088
Consumer durables | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	2,257	2,088
Energy
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	1,046	952
Energy | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	1,046	952
Financials
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	5,302	4,852
Financials | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	5,302	4,852
Health Care
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,972	4,296
Health Care | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,972	4,296
Industrials & materials
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	4,402	4,507
Industrials & materials | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	4,402	4,507
Information technology & communication
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	9,052	8,102
Information technology & communication | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	9,052	8,102
Preferred stocks non-convertible
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	14	37
Preferred stocks non-convertible | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	14	37
Real return mutual funds
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	464
Real return mutual funds | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	464
Exchange traded mutual funds
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	591
Exchange traded mutual funds | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	591
Mid-cap stock funds
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	11,327	11,847
Mid-cap stock funds | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	11,327	11,847
Small-cap stock funds
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,316	4,007
Small-cap stock funds | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,316	4,007
International stock funds
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	4,689	7,849
International stock funds | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	4,689	7,849
Large-cap blend - S&P 500 index
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	20,144	18,044
Large-cap blend - S&P 500 index | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	20,144	18,044
International - Developed markets
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,126	3,138
International - Developed markets | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,126	3,138
Accrued income
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	26	29
Accrued income | Level 2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	26	29
International - Emerging markets
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,338	1,894
International - Emerging markets | Level 1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	3,338	1,894
Fixed income - Investment grade
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Defined benefit plan, fair value of plan assets	$ 22,061	$ 21,340

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanOtherThanFixedIncomeInvestmentGradeMember
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:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_EquitySecuritiesConsumerDiscretionaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesConsumerDurablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesFinancialsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesHealthCareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesIndustrialMaterialsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesInformationTechnologyCommunicationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_PreferredStockNonConvertibleFixedIncomeInvestmentsIndividualSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MutualFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_ExchangeTradedFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesMidCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesSmallCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanEquitySecuritiesInternationalStockFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlansEquityInvestmentsExchangeTradedFundsLargeCapBlendSP500IndexMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlansEquityInvestmentsInternationalDevelopedMarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlanAccruedIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_DefinedBenefitPlansEquityInvestmentsInternationalEmergingMarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arlp_FixedIncomeSecuritiesInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: