|
Counterparty Risk (% Of Total Receivable For Securities Sold) (Details)
|
Dec. 31, 2014
|
|---|---|
| CS First Boston [Member] | |
| Concentration Risk [Line Items] | |
| % of Total Receivable for Securities Sold | 25.00% |
| Morgan Stanley [Member] | |
| Concentration Risk [Line Items] | |
| % of Total Receivable for Securities Sold | 20.00% |
| Citigroup [Member] | |
| Concentration Risk [Line Items] | |
| % of Total Receivable for Securities Sold | 15.00% |