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Bonds Payable - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Disclosure [Abstract] |  |
2022 | $ 46,286 |
2023 | 121,584 |
2024 | 13,505 |
2025 | 13,505 |
Bonds | $ 194,880 | $ 245,988

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- Definition It represents bonds. + References No definition available. + Details
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Namespace Prefix: | arl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Bonds Payable, Maturity, Year Four + References No definition available. + Details
Name: | arl_BondsPayableMaturityYearFour
Namespace Prefix: | arl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Bonds Payable, Maturity, Year One + References No definition available. + Details
Name: | arl_BondsPayableMaturityYearOne
Namespace Prefix: | arl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Bonds Payable, Maturity, Year Three + References No definition available. + Details
Name: | arl_BondsPayableMaturityYearThree
Namespace Prefix: | arl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Bonds Payable, Maturity, Year Two + References No definition available. + Details
Name: | arl_BondsPayableMaturityYearTwo
Namespace Prefix: | arl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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