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Bank Call Loans | 12 Months Ended
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Dec. 31, 2012
Bank Call Loans | 6. Bank Call Loans Bank call loans, primarily payable on demand, bear interest at various rates but not exceeding the broker call rate, which was 2.0% at December 31, 2012 (2.0% at December 31, 2011). Details of the bank call loans are as follows. Expressed in thousands of dollars, except percentages.
|  | 2012 |  |  | 2011 |
Year-end balance |  | $ | 128,300 |  |  | $ | 27,500 |
Weighted interest rate (at end of year) |  |  | 1.23 | % |  |  | 1.25 | %
Maximum balance (at any month end) |  | $ | 171,400 |  |  | $ | 178,600 |
Average amount outstanding (during the year) |  | $ | 73,227 |  |  | $ | 92,657 |
Average interest rate (during the year) |  |  | 1.27 | % |  |  | 1.25 | %
Interest expense for the year ended December 31, 2012 on bank call loans was $996,200 ($1.2 million in 2011 and $805,200 in 2010).

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- Definition Short-term bank loans secured by customers' securities on the balance sheet date. These loans are generally payable on demand and bear interest at various rates not exceeding the broker call rate. + References No definition available. + Details
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