Stockholders' Equity and Non-controlling Interests - Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income (loss) attributable to Farmland Partners Inc.									$ 13,886	$ 12,254	$ 7,914
Less: Nonforfeitable distributions allocated to unvested restricted shares									(77)	(111)	(151)
Net (loss) income available to common stockholders of Farmland Partners Inc.	$ 6,057	$ (4,499)	$ 2,906	$ (3,140)	$ 4,163	$ 484	$ (2,323)	$ (2,744)	$ 1,324	$ (420)	$ 907
Denominator:
Weighted-average number of common shares - basic (in shares)	29,723	29,497	30,637	30,791					30,169	32,162	31,210
Weighted-average number of common shares - diluted (in shares)	69,874	29,497	48,370	30,791					30,169	32,162	31,210
Income (loss) per share attributable to common stockholders - basic	$ 0.20	$ (0.15)	$ 0.09	$ (0.10)					$ 0.04	$ (0.01)	$ 0.03
Preferred Unit
Numerator:
Less: Distributions and dividends									$ (12,485)	$ (12,563)	$ (6,856)
Series A Preferred Units
Numerator:
Less: Distributions and dividends									(3,510)	(3,510)	(3,510)
Series B Participating Preferred Stock
Numerator:
Less: Distributions and dividends									$ (8,975)	$ (9,053)	$ (3,346)