Schedule III - Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Accumulated Depreciation		$ (14,023)	$ (23,584)	$ (30,627)	$ (56,448)
Net Liquidation Adjustment		(52,590)
Total		200,675	$ 377,446	$ 587,952	$ 670,868
Office [Member] | Orlando [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		34,950
Initial Cost to Company, Building and Improvements		17,248
Building and Improvements		17,290
Accumulated Depreciation	[1]	(4,196)
Total		$ 13,094
Date Acquired		2004-11
Life		40 years
Office [Member] | Plantation [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 10,255
Initial Cost to Company, Building and Improvements		8,915
Land		4,000
Building and Improvements		8,935
Accumulated Depreciation	[1]	(2,169)
Total		$ 10,766
Date Acquired		2004-11
Life		40 years
Office [Member] | Lisle 1 [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Cost to Company, Land		$ 3,774
Initial Cost to Company, Building and Improvements		16,371
Land		3,774
Building and Improvements		9,751
Accumulated Depreciation	[1]	(806)
Total		$ 12,719
Date Acquired		2006-02
Life		40 years
Office [Member] | Lisle 2 [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 5,230
Initial Cost to Company, Land		780
Initial Cost to Company, Building and Improvements		2,803
Land		780
Building and Improvements		3,521
Accumulated Depreciation	[1]	(690)
Total		$ 3,611
Date Acquired		2006-02
Life		40 years
Other [Member] | Churchill [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 4,601
Initial Cost to Company, Building and Improvements		23,834
Building and Improvements		11,705
Accumulated Depreciation	[1]	(4,301)
Total		$ 7,404
Date Acquired		2004-11
Life		40 years
Other [Member] | Houston [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 45,000
Initial Cost to Company, Land		16,167
Initial Cost to Company, Building and Improvements		88,769
Land		16,167
Building and Improvements		86,033
Accumulated Depreciation	[1]	(1,861)
Total		$ 100,339
Date Acquired		2013-10
Life		40 years
Other [Member] | Oklahoma City OK [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		$ 8,790
Initial Cost to Company, Land		1,328
Initial Cost to Company, Building and Improvements		13,351
Land		1,328
Building and Improvements		13,754
Total		$ 15,082
Date Acquired		2013-10
Life		40 years
Net Liquidation Adjustment [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Net Liquidation Adjustment	[2]	$ 23,637
Total	[2]	23,637
Liquidation Value [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances		108,826
Initial Cost to Company, Land		22,049
Initial Cost to Company, Building and Improvements		171,291
Land		26,049
Building and Improvements		150,989
Accumulated Depreciation	[1]	(14,023)
Net Liquidation Adjustment	[2]	23,637
Total		$ 186,652

[1] Depreciation expense will not be recorded subsequent to July 31, 2014 as a result of the adoption of our plan of liquidation.

[2] Under the liquidation basis of accounting, our real estate holding are now carried at their estimated value. As a result, the net liquidation adjustment is the net adjustment that we have made to the carrying value of the property in order to reflect its fair value.