Stockholders' Equity and Non-controlling Interests - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income attributable to Farmland Partners Inc.									$ 7,914	$ 4,302	$ 1,227
Less: Nonforfeitable distributions allocated to unvested restricted shares									(151)	(96)	(80)
Net income available to common stockholders of Farmland Partners Inc.	$ 2,461	$ 221	$ 772	$ (2,547)	$ 3,837	$ (841)	$ (38)	$ (1,780)	$ 907	$ 1,178	$ 809
Denominator:
Weighted-average number of common shares - basic (in shares)	32,738	32,862	32,457	26,699					31,210	13,204	9,619
Unvested restricted shares											10
Weighted-average number of common shares - diluted (in shares)	45,591	32,862	32,457	26,699					31,210	13,204	9,629
Income per share attributable to common stockholders - basic	$ 0.08	$ 0.01	$ 0.02	$ (0.10)					$ 0.03	$ 0.09	$ 0.08
Income per share attributable to common stockholders - diluted	$ 0.07	$ 0.01	$ 0.02	$ (0.10)					$ 0.03	$ 0.09	$ 0.08
Redeemable Common Units
Numerator:
Less: Distributions and dividends										$ (113)	$ (338)
Redeemable Preferred OP Units
Numerator:
Less: Distributions and dividends									$ (3,510)	$ (2,915)
Series B Participating Preferred Stock
Numerator:
Less: Distributions and dividends									$ (3,346)