XML 88 R77.htm IDEA: XBRL DOCUMENT
v3.20.2

Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 490,446 | $ 459,753 | $ 1,444,118 | $ 1,280,521
Lease revenue | 7,012 | 6,429 | 19,931 | 17,200
Total revenues from contracts with all customers | 497,458 | 466,182 | 1,464,049 | 1,297,721
Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 159,343 | 149,569 | 472,408 | 407,238
Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 221,669 | 209,595 | 649,175 | 569,036
Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 75,338 | 62,846 | 213,213 | 188,478
Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 34,096 | 35,685 | 104,874 | 109,273
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 2,058 | 4,448 | 6,496
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 413,467 | 392,402 | 1,222,748 | 1,076,234
Lease revenue | 6,179 | 6,429 | 17,591 | 17,200
Total revenues from contracts with all customers | 419,646 | 398,831 | 1,240,339 | 1,093,434
United States | Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 140,773 | 134,903 | 420,002 | 363,547
United States | Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 177,524 | 175,008 | 527,126 | 466,418
United States | Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 66,588 | 53,800 | 187,042 | 164,332
United States | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 28,582 | 26,633 | 84,130 | 75,441
United States | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 2,058 | 4,448 | 6,496
Australia |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 56,660 | 52,823 | 161,550 | 160,808
Lease revenue | 0 | 0 | 0 | 0
Total revenues from contracts with all customers | 56,660 | 52,823 | 161,550 | 160,808
Australia | Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 9,978 | 9,386 | 28,321 | 28,071
Australia | Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 36,898 | 30,521 | 100,918 | 90,016
Australia | Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,882 | 4,383 | 13,275 | 10,590
Australia | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,902 | 8,533 | 19,036 | 32,131
Australia | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
New Zealand |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7,487 | 7,402 | 21,600 | 22,565
Lease revenue | 0 | 0 | 0 | 0
Total revenues from contracts with all customers | 7,487 | 7,402 | 21,600 | 22,565
New Zealand | Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,821 | 3,972 | 11,117 | 12,020
New Zealand | Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,516 | 3,328 | 10,191 | 10,230
New Zealand | Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
New Zealand | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 150 | 102 | 292 | 315
New Zealand | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Argentina |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 2,590 | 2,463 | 7,313 | 7,358
Lease revenue | 0 | 0 | 0 | 0
Total revenues from contracts with all customers | 2,590 | 2,463 | 7,313 | 7,358
Argentina | Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,465 | 1,308 | 3,931 | 3,600
Argentina | Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 663 | 738 | 1,966 | 2,372
Argentina | Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Argentina | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 462 | 417 | 1,416 | 1,386
Argentina | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 10,242 | 4,663 | 30,907 | 13,556
Lease revenue | 833 | 0 | 2,340 | 0
Total revenues from contracts with all customers | 11,075 | 4,663 | 33,247 | 13,556
Canada | Warehouse rent and storage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,306 | 0 | 9,037 | 0
Canada | Warehouse services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,068 | 0 | 8,974 | 0
Canada | Third-party managed |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,868 | 4,663 | 12,896 | 13,556
Canada | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Canada | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 0 | $ 0 | $ 0 | $ 0

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306 + Details
Name: | us-gaap_OperatingLeaseLeaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=art_WarehouseRentAndStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=art_WarehouseServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=art_ThirdPartyManagedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=art_TransportationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=art_QuarryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_AU
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_NZ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_AR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |