Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share Basic And Diluted [Line Items]
Net income attributable to Agree Realty Corporation	$ 39,425	$ 36,663	$ 111,511	$ 89,123
Less: Series A preferred stock dividends	(1,859)	(289)	(5,578)	(289)
Net Income Attributable to Common Stockholders	37,566	36,374	105,933	88,834
Less: Income attributable to unvested restricted shares	(97)	(106)	(283)	(280)
Net income used in basic and diluted earnings per share	$ 37,469	$ 36,268	$ 105,650	$ 88,554
Weighted average number of common shares outstanding	79,930,394	69,304,906	75,590,841	65,826,126
Less: Unvested restricted stock	(229,258)	(202,406)	(229,258)	(202,406)
Weighted average number of common shares outstanding used in basic earnings per share	79,701,136	69,102,500	75,361,583	65,623,720
Weighted average number of common shares outstanding used in basic earnings per share	79,701,136	69,102,500	75,361,583	65,623,720
Effect of dilutive securities:
Share-based compensation	125,925	110,389	111,989	101,931
Weighted average number of common shares outstanding used in diluted earnings per share	80,589,446	69,591,848	75,890,692	65,952,113
Restricted Stock [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	19	9	271	200
2020 ATM Forward Equity Offerings
Effect of dilutive securities:
Forward equity offering	0	268,011	0	178,321
2021 ATM Forward Equity Offerings
Effect of dilutive securities:
Forward equity offering	0	110,948	0	48,141
2022 ATM Forward Equity Offerings
Effect of dilutive securities:
Forward equity offering	156,062	0	65,932	0
December 2021 Forward Offering
Effect of dilutive securities:
Forward equity offering	0	0	119,950	0
May 2022 Forward Offering
Effect of dilutive securities:
Forward equity offering	606,323	0	231,238	0
ATM forward equity offerings | Forward Sale Agreement [Member]
Effect of dilutive securities:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	19,010	0	31,879	0