Debt - Unsecured Term Loan (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
Jul. 31, 2023	Jun. 30, 2025	Dec. 31, 2024
Total principal		$ 3,250,399
Interest rate swaps
Derivative Notional Amount		350,000	$ 550,000
Unsecured Loan
Total principal		350,000	350,000
Unamortized debt issuance costs and assumed debt discounts, net		(2,233)	(2,548)
Total		$ 347,767	347,452
Unsecured Loan \| 2029 Unsecured term loan
All-in Interest Rate		4.52%
Total principal		$ 350,000	$ 350,000
Credit spread on variable rate		0.85%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Debt instrument, face amount	$ 350,000	$ 350,000
Hedge, fixed interest rate		3.57%
Additional lender commitments	$ 500,000
Variable rate	0.10%	0.10%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Debt Instrument, Term	5 years 6 months
Spread on variable rate	0.95%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Unsecured Loan \| 2029 Unsecured term loan \| Minimum
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Spread on variable rate	0.80%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Unsecured Loan \| 2029 Unsecured term loan \| Maximum
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Spread on variable rate	1.60%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Unsecured Loan \| 2029 Unsecured term loan \| Interest Rate Swap Agreement In June 2023
Hedge, fixed interest rate	3.57%
Derivative Notional Amount	$ 350,000

The amount of additional lender commitments under accordion option in a debt instrument.

No definition available.

Name:	adc_DebtInstrumentAdditionalLenderCommitmentsUnderAccordionOption
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of credit spread adjustment to reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Variable Rate Adjustment to Secured Overnight Financing Rate.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

Indicates type of variable interest rate on debt instrument.

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- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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- Definition

Nominal or face amount used to calculate payment on derivative.

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- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Details

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