Note D - Investments in Real Estate Loans (Detail) - Troubled Debt Restructurings (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Number of Loans		7
Fund Balance (in Dollars)	$ 2.2	$ 4.4
Performing Loans [Member] | Commercial Loans [Member]
Number of Loans	3	4
Fund Balance (in Dollars)	1,217,000.0	2,276,000.0
Performing Loans [Member] | Total [Member]
Number of Loans	3	5
Fund Balance (in Dollars)	1,217,000.0	2,441,000.0
Performing Loans [Member] | Construction Loans [Member]
Number of Loans		1
Fund Balance (in Dollars)		165,000.0
Nonperforming Loans [Member] | Commercial Loans [Member]
Number of Loans	1	2
Fund Balance (in Dollars)	1,000,000.0	1,936,000.0
Nonperforming Loans [Member] | Total [Member]
Number of Loans	1	2
Fund Balance (in Dollars)	1,000,000.0	1,936,000.0
Commercial Loans [Member]
Number of Loans	4	6
Fund Balance (in Dollars)	2,217,000.0	4,212,000.0
Total [Member]
Number of Loans	4	7
Fund Balance (in Dollars)	2,217,000.0	4,377,000.0
Construction Loans [Member]
Number of Loans		1
Fund Balance (in Dollars)		$ 165,000.0