XML 47 R35.htm IDEA: XBRL DOCUMENT
v3.22.2

COMMON UNIT-BASED COMPENSATION PLANS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2022
COMMON UNIT-BASED COMPENSATION PLANS |
Summary of non-vested share activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of units |  | Weighted average grant date fair value per unit |  | Intrinsic value |
​ | ​ | ​ | ​ | ​ | ​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-vested grants at January 1, 2022 | ​ | 3,130,475 | ​ | $ | 5.59 | ​ | $ | 39,569 | ​
Granted (1) |  | 687,719 | ​ | ​ | 13.34 | ​ | ​ | ​ | ​
Forfeited |  | (165,224) | ​ |  | 6.72 | ​ | ​ | ​ | ​
Non-vested grants at June 30, 2022 |  | 3,652,970 | ​ |  | 7.00 | ​ | ​ | 66,594 | ​
(1) | The restricted units granted during 2022 have minimum-value guarantees of either $9.62 or $6.41 per unit, regardless of whether or not the awards vest.
SERP and Deferred Compensation Plans |
COMMON UNIT-BASED COMPENSATION PLANS |
Summary of activity in share-based plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of units |  | Weighted average grant date fair value per unit |  | Intrinsic value |
​ | ​ | ​ | ​ | ​ | ​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Phantom units outstanding as of January 1, 2022 | ​ | 668,698 | ​ | $ | 20.37 | ​ | $ | 8,452 | ​
Granted | ​ | 25,359 | ​ | ​ | 15.80 | ​ | ​ | ​ | ​
Phantom units outstanding as of June 30, 2022 |  | 694,057 | ​ |  | 20.20 | ​ | ​ | 12,653 | ​

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=arlp_SupplementalEmployeeRetirementPlanAndDeferredCompensationPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |