CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Performing	$ 143,601	$ 137,280
Allowance for doubtful accounts	17,037	17,037
Deferred revenue from sales to related parties	91,380	91,336
Accounts payable and other liabilities to related parties	$ 56,303	$ 44,383
Series A Preferred stock, par value (in dollars per share)	$ 2.00	$ 2.00
Series A Preferred stock, authorized (in shares)	15,000,000	15,000,000
Series A Preferred stock, issued (in shares)	2,000,614
Series A Preferred stock, outstanding (in shares)	2,000,614	2,000,614
Series A Preferred stock, liquidation preference (in dollars per share)	$ 10	$ 10
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	15,930,145	15,930,145
Common stock, outstanding (in shares)	15,514,360	15,514,360
Treasury stock (in shares)	415,785	415,785
Series A Cumulative Convertible Preferred Stock [Member]
Shares held by subsidiaries (in shares)	900,000	900,000
Related Party [Member]
Performing	$ 125,799	$ 125,915
Allowance for doubtful accounts	15,537	15,537
Deferred revenue from sales to related parties	70,935	70,892
Accounts payable and other liabilities to related parties	$ 10,854	$ 7,236
Transcontinential Realty Investors [Member] | Common Stock [Member]
Shares held by subsidiaries (in shares)	140,000	140,000
Treasury stock (in shares)	140,000	140,000