XML 69 R42.htm IDEA: XBRL DOCUMENT
v3.19.3

Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 31, 2019 | Apr. 30, 2019 | Sep. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Jul. 31, 2019 | May 31, 2018
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  | 90,000,000 |  |  | 90,000,000 |  | 45,000,000 |  |  | 90,000,000 |  | 90,000,000 |  |
Proceeds From Issuance Of Common Stock |  |  |  |  |  |  |  |  |  | $ 276,960 | $ 159,604 |  |  |
Preferred stock, par value (in dollars per share) |  |  |  |  | $ 0.0001 |  |  |  |  | $ 0.0001 |  | $ 0.0001 |  |
Preferred stock, shares authorized |  |  |  |  | 4,000,000 |  |  |  |  | 4,000,000 |  | 4,000,000 |  |
Series A Junior Participating Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Redesignated of Shares Authorized |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  | 444,251 | 3,512,500 | 874,268 | 3,450,000 |  |  |  |  |  |
At-Market Equity Program [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  |  |  |  | 886,768 |  |  | 3,057,263 |  |
Proceeds From Issuance Of Common Stock |  |  |  |  |  |  |  |  | $ 59,300 |  |  | $ 181,200 |  |
Value Of Equity Instruments To Be Issued |  |  |  |  | $ 0 |  |  |  |  | $ 0 |  |  |  | $ 250,000
Common stock Average Price |  |  |  |  |  |  |  |  | $ 66.83 |  |  | $ 59.28 |  |
At-Market Equity Program Two [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  | 444,228 |  |  |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock |  |  |  |  | $ 33,000 |  |  |  |  |  |  |  |  |
Gross Amount Remaining To Be Issued |  |  |  |  |  |  |  |  |  | $ 367,000 |  |  |  |
Common stock Average Price |  |  |  |  | $ 74.30 |  |  |  |  |  |  |  |  |
At-Market Equity Program Two [Member] | ATM Program [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value Of Equity Instruments To Be Issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000 |
March 2018 Forward Sale [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Contract Indexed to Issuer's Equity, Shares |  |  |  | 3,450,000 |  |  |  |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock |  |  | $ 160,200 |  |  |  |  |  |  |  |  |  |  |
September 2018 Forward Sales |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Contract Indexed to Issuer's Equity, Shares |  |  | 3,500,000 |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 3,500,000 |  |  |  |  |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock | $ 186,000 |  |  |  |  |  |  |  |  |  |  |  |  |
April 2019 Forward Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Contract Indexed to Issuer's Equity, Shares |  | 3,162,500 |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | adc_CommonStockAveragePrice
Namespace Prefix: | adc_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross amount remaining and available to be issued under the ATM program. + References No definition available. + Details
Name: | adc_GrossAmountRemainingToBeIssued
Namespace Prefix: | adc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of shares redesignated and reclassified during the period. + References No definition available. + Details
Name: | adc_PreferredStockRedesignatedOfSharesAuthorized
Namespace Prefix: | adc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total amount which can be issued under the ATM program. + References No definition available. + Details
Name: | adc_ValueOfEquityInstrumentsToBeIssued
Namespace Prefix: | adc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of shares that could be issued to net share settle a contract, if applicable. If a contract does not have a fixed or determinable maximum number of shares that may be required to be issued, disclose the fact that a potentially infinite number of shares could be issued to settle the contract. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 + Details
Name: | us-gaap_ForwardContractIndexedToIssuersEquityShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=adc_AtMarketEquityProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=adc_AtMarketEquityProgramTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=adc_AtmProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis=adc_March2018ForwardSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis=adc_September2018ForwardSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis=adc_April2019ForwardEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |