Real Estate Held-for-Sale (Details) (USD $)	3 Months Ended		9 Months Ended				1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Dec. 31, 2009	May 31, 2010 Lealand Place	Sep. 30, 2011 Lealand Place	Sep. 30, 2010 Lealand Place	Sep. 30, 2011 Lealand Place	Sep. 30, 2010 Lealand Place	Dec. 31, 2010 Lealand Place
Real Estate Assets and Liabilities:
Land and buildings, net of accumulated depreciation	$ 10,651,000		$ 10,651,000		$ 10,732,000			$ 10,651,000		$ 10,651,000		$ 10,732,000
Cash and other assets	421,026,000	270,925,000	421,026,000	270,925,000	345,243,000	653,460,000		839,000		839,000		240,000
Accrued interest and other payables								(302,000)		(302,000)		(130,000)
Real estate assets, net								11,188,000		11,188,000		10,842,000
Remaining balance of loan to Lealand								445,000		445,000		439,000
Real estate loss from operations
Revenue from operations of real estate held-for-sale	390,000	369,000	1,146,000	1,100,000				390,000	369,000	1,146,000	1,100,000
Mortgage interest expense and prepayment penalty											(392,000)
Other real estate operating expense								(237,000)	(216,000)	(660,000)	(637,000)
Depreciation and amortization expense			(2,263,000)	(483,000)					(90,000)	(114,000)	(269,000)
Income/(loss) from real estate operations, net								153,000	63,000	372,000	(198,000)
Prepaid penalty paid for early payment of mortgage collateralized by the property							$ 130,000