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v3.19.3

Discontinued Operations (Detail) - property | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019
Discontinued Operations |  |
Number of Properties Classified As Discontinued Operations | 0 | 0

X
- Definition The number of properties classified as discontinued operations. + References No definition available. + Details
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Namespace Prefix: | adc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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