Stockholders' Equity and Non-controlling Interests - Redeemable non-controlling interest (Details) - USD ($) $ / shares in Units, $ in Thousands														1 Months Ended	3 Months Ended		12 Months Ended
	May 06, 2020	Apr. 15, 2020	Feb. 07, 2020	Jan. 15, 2020	Nov. 11, 2019	Oct. 15, 2019	Aug. 06, 2019	Jul. 15, 2019	May 08, 2019	Apr. 15, 2019	Feb. 07, 2019	Aug. 17, 2017	Mar. 02, 2016	Aug. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Aug. 10, 2017
Change in redeemable non-controlling interest
Opening balance															$ 120,510
Ending balance															117,877		$ 120,510
Series B Participating Preferred Stock, $0.01 par value, 6,037,500 shares authorized; 5,924,060 shares issued and outstanding at March 31, 2020, and 5,972,059 at December 31, 2019															141,885		142,861
Series B Participating Preferred Stock															$ 141,885		$ 142,861
Dividend paid (in dollars per share)		$ 0.0500		$ 0.0500		$ 0.0500		$ 0.0500		$ 0.0500
Dividends declared per common share			$ 0.0500		$ 0.0500		$ 0.0500		$ 0.0500		$ 0.0500				$ 0.0500	$ 0.0500	$ 0.2000
Repayment of principal															$ 42	$ 2,133
Distributions payable															$ 95	120
Redeemable Preferred OP Units
Change in redeemable non-controlling interest
Percentage of cumulative preferential dividends															3.00%
Redeemable Preferred OP Units | Preferred Share
Change in redeemable non-controlling interest
Opening balance															$ 120,510	$ 120,510	$ 120,510
Opening balance (in shares)															117,000	117,000	117,000
Distributions paid to non-controlling interest															$ (3,510)	$ (3,510)
Accrued distributions to non-controlling interest															878	878
Ending balance															$ 117,878	$ 117,878	$ 120,510
Ending balance (in shares)															117,000	117,000	117,000
Series A Preferred Units
Change in redeemable non-controlling interest
Percentage of preferential cash distribution													3.00%
Liquidation preference													$ 1,000
Number of trading days															20 days
Distributions payable															$ 900
Series A Preferred Units | Asset acquisition
Change in redeemable non-controlling interest
Liquidation value															$ 117,900		$ 120,500
Series A Preferred Units | Asset acquisition | Illinois
Stockholders’ Equity and Non-controlling Interests
Issuance of Common units as partial consideration for asset acquisition (in shares)													117,000
Series B Participating Preferred Stock
Change in redeemable non-controlling interest
Percentage of cumulative change in the estimated value of farmland												50.00%
Final liquidation preference, percentage cap on total return												9.00%
Number of preceding years considered in redemption price calculation															4 years
Constant percentage															50.00%
USDA FVA annual adjustment amount per share of Series B Participating Preferred Stock														$ 0.69
Shares issued under underwriting agreement												6,037,500						6,037,500
Preference dividend (as a percent)												6.00%
Par value												$ 0.01
Common stock, issue price (in dollars per share)												25.00
Liquidation preference												$ 25
Distributions paid															$ 2,200
Series B Participating Preferred Stock | Subsequent event
Change in redeemable non-controlling interest
Preference dividend (as a percent)	6.00%