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Deferred Income (Details Narrative) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deferred Income
Deferred gain	$ 21,609	$ 24,761

X

- References

No definition available.

+ Details

Name:	arl_DeferredIncomeAbstract
Namespace Prefix:	arl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredGainOnSaleOfProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant