Impairment of Long-Lived Assets - Additional Information (Detail)		3 Months Ended			6 Months Ended
	Mar. 28, 2016 USD ($)	Jun. 30, 2016 USD ($) a Property	Mar. 31, 2016 USD ($) Property	Mar. 31, 2015 USD ($) Property	Jun. 30, 2016 USD ($) a Property	Jun. 30, 2015 USD ($)
Property Plant And Equipment [Line Items]
Impairment Charges		$ 1,970,822	$ 210,000	$ 510,000	$ 2,180,730	$ 510,041
Number of income properties held for sales | Property			1	2
Gain (Loss) recognized	$ 11,400,000		$ (134,000)			(277,000)
Estimated closing costs			$ 76,000			$ 233,000
Area of lease | a		10,500			10,500
Altamonte Springs Florida [Member]
Property Plant And Equipment [Line Items]
Impairment Charges		$ 942,000
Number of income properties held for sales | Property		1			1
Gain (Loss) recognized		$ (783,000)
Estimated closing costs		159,000
6 Acres of Undeveloped Land in Daytona Beach Florida [Member]
Property Plant And Equipment [Line Items]
Impairment Charges		717,000
Gain (Loss) recognized		(646,000)
Estimated closing costs		$ 71,000
Area of land impairment charges recognized | a		4			4
Area of lease | a		6			6
4 Acres of Undeveloped Land in Daytona Beach Florida [Member]
Property Plant And Equipment [Line Items]
Impairment Charges		$ 311,000
Gain (Loss) recognized		(256,000)
Estimated closing costs		$ 55,000
Area of lease | a		4			4