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Off-balance sheet financial instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2012
Guarantees [Abstract] |  |
Expiration period of standby letters | 12 months |
Amount of standby letters of credit | $ 25,756 | $ 11,522

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- Definition Expiration Of Stand By Letters Of Credit + References No definition available. + Details
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- Details
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- Definition The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 10 -Section 05 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7517284&loc=d3e93645-111703 + Details
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