Financial Instruments (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Financial Instruments (Textual) [Abstract]
Financial assets or liabilities adjusted to fair value	$ 0	$ 0

- Definition

The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

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