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Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Earnings Per Share Basic And Diluted [Line Items] |  |  |
Net income attributable to Agree Realty Corporation | $ 122,273 | $ 91,381 | $ 80,081
Less: Series A preferred stock dividends | (2,148) | 0 | 0
Net Income Attributable to Common Stockholders | 120,125 | 91,381 | 80,081
Less: Income attributable to unvested restricted shares | (369) | (297) | (379)
Net income used in basic and diluted earnings per share | $ 119,756 | $ 91,084 | $ 79,702
Weighted average number of common shares outstanding | 67,004,069 | 52,013,137 | 40,771,300
Less: Unvested restricted stock | (201,827) | (174,918) | (193,954)
Weighted average number of common shares outstanding used in basic earnings per share | 66,802,242 | 51,838,219 | 40,577,346
Weighted average number of common shares outstanding used in basic earnings per share | 66,802,242 | 51,838,219 | 40,577,346
Effect of dilutive securities: |  |  |
Share-based compensation | 118,460 | 95,103 | 98,740
Weighted average number of common shares outstanding used in diluted earnings per share | 67,139,079 | 52,396,734 | 41,223,614
Restricted Stock [Member] |  |  |
Effect of dilutive securities: |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 2,092 |  |
Performance Units [Member] |  |  |
Effect of dilutive securities: |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 1,547 |
September 2018 Forward Sales [Member] |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 0 | 0 | 269,785
April 2019 Forward Equity |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 0 | 0 | 277,225
2019 ATM Forward Equity |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 0 | 14,289 | 518
2019 ATM Forward Equity | Forward Sale Agreement [Member] |  |  |
Effect of dilutive securities: |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 17,114 | 7,931
2020 ATM Forward Equity |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 153,200 | 19,777 | 0
2020 ATM Forward Equity | Forward Sale Agreement [Member] |  |  |
Effect of dilutive securities: |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 5,360 | 27,753 |
April 2020 Forward Equity |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 0 | 429,346 | 0
2021 ATM Forward Equity |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 50,757 | 0 | 0
2021 ATM Forward Equity | Forward Sale Agreement [Member] |  |  |
Effect of dilutive securities: |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 849 |  |
December 2021 Forward Offering |  |  |
Effect of dilutive securities: |  |  |
Forward equity offering | 14,420 | 0 | 0

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