Condensed Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands	Total	PREFERRED SECURITIES	COMMON SECURITIES	UNDISTRIBUTED EARNINGS
Balance, beginning of period at Dec. 31, 2009		$ 750,000	$ 23,196	$ 0
Earnings	40,593			40,593
Distributions				(40,593)
Balance, end of period at Sep. 30, 2010	773,196	750,000	23,196	0
Balance, beginning of period at Dec. 31, 2010	773,196	750,000	23,196	0
Earnings	40,593			40,593
Distributions				(40,593)
Balance, end of period at Sep. 30, 2011	$ 773,196	$ 750,000	$ 23,196	$ 0