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Receivables From And Payables To Brokers, Dealers, And Clearing Agencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivables from and Payables to Brokers, Dealers, and Clearing Agencies [Abstract]
Interest On Margin Payable	$ 627	$ 1,456	$ 2,513

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- Definition

Interest On Margin Payable

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No definition available.

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