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Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Basic And Diluted [Line Items]
Net income attributable to Agree Realty Corporation	$ 36,113	$ 30,112
Less: Series A preferred stock dividends	(1,859)	0
Net Income Attributable to Common Stockholders	34,254	30,112
Less: Income attributable to unvested restricted shares	(110)	(103)
Net income used in basic and diluted earnings per share	$ 34,144	$ 30,009
Weighted average number of common shares outstanding	71,471,247	63,048,905
Less: Unvested restricted stock	(242,317)	(220,008)
Weighted average number of common shares outstanding used in basic earnings per share	71,228,930	62,828,897
Weighted average number of common shares outstanding used in basic earnings per share	71,228,930	62,828,897
Effect of dilutive securities:
Share-based compensation	58,190	62,454
Weighted average number of common shares outstanding used in diluted earnings per share	71,336,103	62,940,360
Restricted Stock [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,733	6,920
Performance Units [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,078
2020 ATM Forward Equity
Effect of dilutive securities:
Forward equity offering	0	49,009
2020 ATM Forward Equity | Forward Sale Agreement [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		3,397
2021 ATM Forward Equity
Effect of dilutive securities:
Forward equity offering	980	0
2021 ATM Forward Equity | Forward Sale Agreement [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	76,623	664
December 2021 Forward Offering
Effect of dilutive securities:
Forward equity offering	48,003	0

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