Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Basic And Diluted [Line Items]
Net income attributable to Agree Realty Corporation	$ 35,973	$ 22,347	$ 72,086	$ 52,459
Less: Series A preferred stock dividends	(1,859)		(3,718)	0
Net Income Attributable to Common Stockholders	34,114	22,347	68,368	52,459
Less: Income attributable to unvested restricted shares	(103)	(71)	(207)	(175)
Net income used in basic and diluted earnings per share	$ 34,011	$ 22,276	$ 68,161	$ 52,284
Weighted average number of common shares outstanding	75,277,924	65,055,820	73,385,101	64,057,906
Less: Unvested restricted stock	(240,004)	(219,836)	(240,004)	(219,836)
Weighted average number of common shares outstanding used in basic earnings per share	75,037,920	64,835,984	73,145,097	63,838,070
Weighted average number of common shares outstanding used in basic earnings per share	75,037,920	64,835,984	73,145,097	63,838,070
Effect of dilutive securities:
Share-based compensation	92,177	98,202	85,345	91,413
Weighted average number of common shares outstanding used in diluted earnings per share	75,570,089	65,185,604	73,474,930	64,079,697
Restricted Stock [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	483	1,440	1,305	2,743
2020 ATM Forward Equity
Effect of dilutive securities:
Forward equity offering		217,943	0	133,476
2021 ATM Forward Equity
Effect of dilutive securities:
Forward equity offering	40,752	33,475	20,867	16,738
December 2021 Forward Offering
Effect of dilutive securities:
Forward equity offering	311,848		179,925	0
May 2022 Forward Offering
Effect of dilutive securities:
Forward equity offering	87,392		43,696	0
ATM forward equity offerings | Forward Sale Agreement [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4	0	38,316	0