XML 77 R64.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Business Combinations - Acquisition Consideration with Measurement Period Adjustments (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Nov. 02, 2021 | Dec. 31, 2020 | Dec. 30, 2021 | Dec. 30, 2020 | Nov. 02, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Assets |  |  |  |  |  |  |  |  |
Operating lease right-of-use assets | $ 22,842 | $ 22,842 |  | $ 268,633 |  |  |  |  |
Financing leases | 417 | 417 |  | 0 |  |  |  |  |
Goodwill | 1,072,980 | 1,072,980 |  | 794,335 |  |  |  | $ 318,483 | $ 186,095
Purchase Price Allocation Adjustments |  | $ 201,945 |  | 1,115 |  |  |  |  |
Hall's Warehouse Corporation |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Land |  |  | $ 32,560 |  |  |  | $ 29,352 |  |
Land, Measurement Period Adjustments |  |  | 3,208 |  |  |  |  |  |
Buildings and improvements |  |  | 154,809 |  |  |  | 239,708 |  |
Building and improvements, Measurement Period Adjustments |  |  | (84,899) |  |  |  |  |  |
Machinery and equipment |  |  | 22,819 |  |  |  | 63,596 |  |
Machinery and equipment, Measurement Period Adjustments |  |  | (40,777) |  |  |  |  |  |
Assets under construction |  |  | 41 |  |  |  | 0 |  |
Assets under construction, Measurement Period Adjustments |  |  | 41 |  |  |  |  |  |
Operating lease right-of-use assets |  |  | 27,139 |  |  |  | 26,400 |  |
Operating lease, right-of-use asset, Measurement Period Adjustments |  |  | 739 |  |  |  |  |  |
Cash and cash equivalents |  |  | 7,582 |  |  |  | 7,894 |  |
Cash and cash equivalents, Measurement Period Adjustments |  |  | (312) |  |  |  |  |  |
Accounts receivable |  |  | 11,894 |  |  |  | 11,894 |  |
Accounts receivable, Measurement Period Adjustments |  |  | 0 |  |  |  |  |  |
Goodwill |  |  | 173,483 |  |  |  | 42,737 |  |
Purchase Price Allocation Adjustments |  |  | 130,746 |  |  |  |  |  |
Other assets |  |  | 303 |  |  |  | 303 |  |
Other assets, Measurement Period Adjustments |  |  | 0 |  |  |  |  |  |
Total assets |  |  | 534,630 |  |  |  | 524,616 |  |
Total assets, Measurement Period Adjustments |  |  | 10,014 |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses |  |  | 6,165 |  |  |  | 4,006 |  |
Accounts payable and accrued expenses, Measurement Period Adjustments |  |  | 2,159 |  |  |  |  |  |
Operating lease obligations |  |  | 25,739 |  |  |  | 26,400 |  |
Operating lease obligations, Measurement Period Adjustments |  |  | (661) |  |  |  |  |  |
Unearned revenue |  |  | 1,625 |  |  |  | 0 |  |
Unearned revenue, Measurement Period Adjustments |  |  | 1,625 |  |  |  |  |  |
Deferred tax liability |  |  | 11,903 |  |  |  | 5,012 |  |
Deferred tax liability, Measurement Period Adjustments |  |  | 6,891 |  |  |  |  |  |
Total liabilities |  |  | 45,432 |  |  |  | 35,418 |  |
Total liabilities, Measurement Period Adjustments |  |  | 10,014 |  |  |  |  |  |
Total consideration, including common shares issued and deferred consideration |  |  | 489,198 |  |  |  | 489,198 |  |
Total consideration, Measurement Period Adjustments |  |  | 0 |  |  |  |  |  |
Hall's Warehouse Corporation | Customer relationships |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Acquired identifiable intangibles: Customer relationships |  |  | 104,000 |  |  |  | $ 102,732 |  |
Acquired identifiable intangible assets: Customer relationships, Measurement Period Adjustments |  |  | $ 1,268 |  |  |  |  |  |
Agro Merchants Group |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Land |  |  |  |  | $ 167,592 | $ 95,286 |  |  |
Land, Measurement Period Adjustments | 72,306 |  |  |  |  |  |  |  |
Buildings and improvements |  |  |  |  | 637,518 | 778,170 |  |  |
Building and improvements, Measurement Period Adjustments | (140,652) |  |  |  |  |  |  |  |
Machinery and equipment |  |  |  |  | 229,057 | 206,453 |  |  |
Machinery and equipment, Measurement Period Adjustments | 22,604 |  |  |  |  |  |  |  |
Assets under construction |  |  |  |  | 14,099 | 0 |  |  |
Assets under construction, Measurement Period Adjustments | 14,099 |  |  |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  | 203,128 | 191,229 |  |  |
Operating lease, right-of-use asset, Measurement Period Adjustments | 11,899 |  |  |  |  |  |  |  |
Financing leases |  |  |  |  | 30,461 | 46,845 |  |  |
Financing lease asset, Measurement Period Adjustments | (16,384) |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 46,788 |  | 47,534 |  |  |
Cash and cash equivalents, Measurement Period Adjustments | (746) |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 77,513 | 78,423 |  |  |
Accounts receivable, Measurement Period Adjustments | (910) |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | 417,872 | 346,673 |  |  |
Purchase Price Allocation Adjustments | 71,199 |  |  |  |  |  |  |  |
Investments in partially owned entities |  |  |  |  | 11,099 | 21,638 |  |  |
Investment in partially owned entities, Measurement Period Adjustments | (10,539) |  |  |  |  |  |  |  |
Other assets |  |  |  |  | 26,613 | 20,038 |  |  |
Other assets, Measurement Period Adjustments | 6,575 |  |  |  |  |  |  |  |
Total assets |  |  |  | $ 2,165,790 | 2,124,000 |  |  |  |
Total assets, Measurement Period Adjustments | (41,790) |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses |  |  |  |  | 112,354 | 86,467 |  |  |
Accounts payable and accrued expenses, Measurement Period Adjustments | 25,887 |  |  |  |  |  |  |  |
Operating lease obligations |  |  |  |  | 193,194 | 191,229 |  |  |
Operating lease obligations, Measurement Period Adjustments | 1,965 |  |  |  |  |  |  |  |
Financing lease obligations |  |  |  |  | 30,461 | 46,845 |  |  |
Financing lease obligations, Measurement Period Adjustments | (16,384) |  |  |  |  |  |  |  |
Sale-leaseback obligations |  |  |  |  | 73,075 | 73,075 |  |  |
Sale-leaseback obligations, Measurement Period Adjustments | 0 |  |  |  |  |  |  |  |
Unearned revenue |  |  |  |  | 5,099 | 4,393 |  |  |
Unearned revenue, Measurement Period Adjustments | 706 |  |  |  |  |  |  |  |
Deferred tax liability |  |  |  |  | 120,567 | 175,719 |  |  |
Deferred tax liability, Measurement Period Adjustments | (55,152) |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  | 534,750 | 577,728 |  |  |
Total liabilities, Measurement Period Adjustments | (42,978) |  |  |  |  |  |  |  |
Total consideration, including common shares issued and deferred consideration |  |  |  |  | 1,589,250 | 1,588,062 |  |  |
Total consideration, Measurement Period Adjustments | 1,188 |  |  |  |  |  |  |  |
Agro Merchants Group | Customer relationships |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Acquired identifiable intangibles: Customer relationships |  |  |  |  | $ 262,260 | $ 333,501 |  |  |
Acquired identifiable intangible assets: Customer relationships, Measurement Period Adjustments | $ (71,241) |  |  |  |  |  |  |  |

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable and Accrued Expenses + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayableandAccruedExpenses
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsReceivable
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Under Construction + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssetsUnderConstruction
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Building and Improvements + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBuildingandImprovements
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash and Cash Equivalents + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashandCashEquivalents
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Equity Method Investments + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentEquityMethodInvestments
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Finance Lease, Liability + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinanceLeaseLiability
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Finance Lease, Right-of-Use Asset + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinanceLeaseRightOfUseAsset
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Land + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLand
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Machinery and Equipment + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentMachineryandEquipment
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Operating Lease, Liability + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOperatingLeaseLiability
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Operating Lease, Right-of-Use Asset + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOperatingLeaseRightofUseAsset
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAssets
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Sale Leaseback Transaction, Net Book Value + References No definition available. + Details
Name: | art_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSaleLeasebackTransactionNetBookValue
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Recognized Identifable Assets Acquired and Liabilites Assumed, Sale Leaseback Transaction, Net Book Value + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifableAssetsAcquiredAndLiabilitesAssumedSaleLeasebackTransactionNetBookValue
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue, Net Book Value + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenueNetBookValue
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity Method Investments + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquityMethodInvestments
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Liability + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseLiability
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Right-of-Use Asset + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseRightOfUseAsset
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable and Accrued Liabilities + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccountsPayableandAccruedLiabilities
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Including Goodwill + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Under Construction + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsUnderConstruction
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings and Improvements + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBuildingsandImprovements
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Liability + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOperatingLeaseLiability
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Right-of-Use Asset + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOperatingLeaseRightofUseAsset
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets + References No definition available. + Details
Name: | art_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=SL65897772-128472 + Details
Name: | us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=SL65897772-128472 + Details
Name: | us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=123455525&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of real estate acquired, at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e961-128460 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=art_HallsWarehouseCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=art_AgroMerchantsGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |