Quarterly report pursuant to Section 13 or 15(d)

Business - Additional Information (Detail)

v3.19.1
Business - Additional Information (Detail)
3 Months Ended
Mar. 31, 2019
Maryland  
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]  
Company re-incorporated date Mar. 24, 2011
Land Advisers  
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]  
Company's ownership percent (as percent) 100.00%