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Cash and Securities Segregated for Regulatory and Other Purposes
12 Months Ended
Dec. 31, 2014
Brokers and Dealers [Abstract]  
Cash and Securities Segregated for Regulatory and Other Purposes
Cash and securities segregated for regulatory and other purposes
Deposits of $17.7 million were held at year-end in special reserve bank accounts for the exclusive benefit of customers in accordance with regulatory requirements at December 31, 2014 ($35.5 million at December 31, 2013). To the extent permitted, these deposits are invested in interest bearing accounts collateralized by qualified securities.