Commitments and Contingencies (Details)		1 Months Ended		12 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	May 31, 2016 USD ($)	Dec. 31, 2017 USD ($) property	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Apr. 16, 2014 property item
Future minimum lease payments
Monthly payment amount	$ 10,366	$ 10,200	$ 10,032
2018				$ 126,000
2019				74,000
Total future minimum lease payments				200,000
Number of properties | property							38
Grain storage facilities | item							3
Fee simple interest							100.00%
Capital Commitments
2018				3,578,000
Total capital commitments				3,578,000
Farms acquired and allocation of purchase price
Payment to acquire property				$ 206,166,000	$ 131,776,000	$ 109,309,000
South Carolina, North Carolina and Nebraska
Farms acquired and allocation of purchase price
Properties under contract | property				3
Payment to acquire property				$ 27,000,000