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ALLOWANCE FOR ESTIMATED LOSSES (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Allowance For Estimated Losses Details |  |  |
Balance January 1, | $ 18,279 | $ 19,600 | $ 21,704
Increase (decrease) in provision | (1,242) | (1,321) | (2,104)
Balance December 31, | $ 17,037 | $ 18,279 | $ 19,600

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

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- Definition The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6873192&loc=d3e21338-158488 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of expense recognized in the income statement for a decrease in valuation of real estate owned (REO). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_RealEstateOwnedValuationAllowanceProvision1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration