Investments in Associated Companies (Narrative) (Details) (USD $)	1 Months Ended		1 Months Ended
	Apr. 30, 2011 Jefferies Group Inc [Member]	Jun. 30, 2011 Jefferies Group Inc [Member]	Jun. 30, 2011 Berkadia Commercial Mortgage [Member]
Repayment of secured credit facility			$ 250,000,000
Percentage of shares owned		27.00%
Sale of common shares by associated company	20,600,000
Common stock purchased, shares	5,154,639
Cash consideration	$ 125,000,000