Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Acquisition Activity (Details)

v3.8.0.1
Subsequent Events - Acquisition Activity (Details)
$ in Millions
Jan. 31, 2018
USD ($)
a
Dec. 31, 2017
a
Dec. 31, 2016
a
Subsequent Event [Line Items]      
Total acres   63,014 50,592
Kern County, California | Subsequent Event      
Subsequent Event [Line Items]      
Total acres 161    
Consideration transferred | $ $ 2.9