XML 86 R69.htm IDEA: XBRL DOCUMENT
v3.25.4

Acquisition, Cyber Incident and Other, Net - Schedule of Acquisition, Cyber Incident and Other, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Acquisition, Litigation and Other Special Charges [Abstract] |  |  |
Orion - transformation related costs (non-capitalizable costs) | $ 30,773 | $ 21,147 | $ 3,045
Closed site costs, excluding severance | 21,878 | 5,102 | 6,873
Other, net | 17,172 | 3,576 | 2,058
Orion - Oracle related costs (non-capitalizable costs) | 12,292 | 37,040 | 10,884
Acquisition and integration related costs | 9,310 | 8,906 | 5,094
Severance costs | 7,659 | 6,608 | 4,795
Cyber incident related costs, net of insurance recoveries | 4,809 | (5,210) | 28,877
Pension plan termination charges | 0 | 0 | 2,461
Total acquisition, cyber incident, and other, net | $ 103,893 | $ 77,169 | $ 64,087

X
- Definition Acquisition, Cyber Incident Related Costs, Net of Insurance Recoveries + References No definition available. + Details
Name: | art_AcquisitionCyberIncidentRelatedCostsNetOfInsuranceRecoveries
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Acquisition, Litigation and Other Special Charges [Abstract] + References No definition available. + Details
Name: | art_AcquisitionLitigationandOtherSpecialChargesAbstract
Namespace Prefix: | art_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business Combination, Acquisition Related Expenses, Closed Site Cost, Excluding Severance + References No definition available. + Details
Name: | art_BusinessCombinationAcquisitionRelatedExpensesClosedSiteCostExcludingSeverance
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Cyber Incident, Acquisition Related Expenses, Litigations Expense and Other + References No definition available. + Details
Name: | art_BusinessCombinationCyberIncidentAcquisitionRelatedExpensesLitigationsExpenseAndOther
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business Combination, Cyber Incident-Related Costs, Expense + References No definition available. + Details
Name: | art_BusinessCombinationCyberIncidentRelatedCostsExpense
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other Acquisition, Litigation Income (Expense), Net + References No definition available. + Details
Name: | art_OtherAcquisitionLitigationIncomeExpenseNet
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Pension Plan Termination Charges + References No definition available. + Details
Name: | art_PensionPlanTerminationCharges
Namespace Prefix: | art_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense for acquisition-related cost incurred to effect business combination. Includes, but is not limited to, finder's fee; advisory, legal, accounting, valuation, and other professional and consulting fees; and general administrative cost, including cost of maintaining internal acquisition department. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-7 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense for integration-related cost incurred in connection with business combination. Includes system integration and conversion costs; severance and other employee-related costs; restructuring and other post-combination costs. Excludes acquisition-related cost incurred to effect business combination; cost to issue debt or equity securities; and cost related to acquisition of asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-7 + Details
Name: | us-gaap_BusinessCombinationIntegrationRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_SeveranceCosts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration