XML 70 R45.htm IDEA: XBRL DOCUMENT
v3.20.4

INVESTMENTS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
INVESTMENTS |
Schedule of changes in equity method investment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2020 |  | 2019 |  | 2018
​ | ​ | (in thousands)
Beginning balance | ​ | $ | 28,529 | ​ | $ | 28,974 | ​ | $ | 14,182
Contributions | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,600
Equity method investment income | ​ | ​ | 907 | ​ | ​ | 2,203 | ​ | ​ | 547
Distributions received | ​ | ​ | (1,895) | ​ | ​ | (2,648) | ​ | ​ | (1,355)
Other | ​ | ​ | (273) | ​ | ​ | — | ​ | ​ | —
Ending balance | ​ | $ | 27,268 | ​ | $ | 28,529 | ​ | $ | 28,974

X
- Definition Tabular disclosure of changes in the carrying amount of equity method investment. + References No definition available. + Details
Name: | arlp_ScheduleOfChangesInEquityInvestmentInSubsidiaryTableTextBlock
Namespace Prefix: | arlp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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