Saddlebrook Rental Pool Operation - Schedule of Financial Information - Statements of Changes in Participants' Fund Balances (Detail) - Saddlebrook Rental Pool Operation [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Distribution Fund [Member]
Additions:
Amount available for distribution	$ 299,482	$ 376,530	$ 2,579,027	$ 2,584,659
Reductions:
Amount withheld for maintenance escrow fund			(428,876)	(412,164)
Amount accrued or paid to participants			(2,150,151)	(2,172,495)
Maintenance Escrow Fund [Member]
Supplementary Financial Statements For Owners Participating In Condo Rental Pool Agreement [Line Items]
Balance at beginning of period			334,392	371,247
Additions:
Amount withheld from distribution fund			428,876	412,164
Unit owner payments			1,366,311	107,921
Interest earned			37
Reductions:
Escrow account refunds			(10,731)	(20,742)
Maintenance charges			(190,006)	(286,336)
Unit renovations			(186,683)	(130,756)
Linen replacement			(111,334)	(185,436)
Reductions:
Balance at end of period	$ 1,630,862	$ 268,062	$ 1,630,862	$ 268,062