Condensed Balance Sheets (Parenthetical) (Unaudited) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
STOCKHOLDERS' EQUITY
Preferred securities, dividend rate	7.00%	7.00%
Preferred securities, shares authorized	30,000,000	30,000,000
Preferred securities, shares issued	30,000,000	30,000,000
Preferred securities, shares outstanding	30,000,000	30,000,000
Preferred securities, liquidation amount per security	$ 25	$ 25
Common securities, dividend rate	7.00%	7.00%
Common securities, shares authorized	927,840	927,840
Common securities, shares issued	927,840	927,840
Common securities, shares outstanding	927,840	927,840
Common securities, liquidation amount per security	$ 25	$ 25