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Regulatory Requirements - Narrative (Details) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($)
Oppenheimer [Member] |  |
Regulatory Capital Requirements [Line Items] |  |
Required percentage of net capital to aggregate customer-related debit items |  | 2.00%
Initial capital | $ 143,400,000 | $ 143,400,000
Aggregate indebtedness |  | 9.01%
Excess capital | 111,600,000 | $ 111,600,000
Freedom [Member] |  |
Regulatory Capital Requirements [Line Items] |  |
Initial capital | $ 5,800,000 | 5,800,000
Aggregate indebtedness | 6.67% |
Freedom maintain net capital equal to the greater | $ 250,000 | 250,000
Net capital in excess of minimum required | $ 5,600,000 | $ 5,600,000
Oppenheimer Europe Ltd [Member] | Basel Three New Requirements [Member] |  |
Regulatory Capital Requirements [Line Items] |  |
Common equity Tier 1 capital ratio | 9.56% | 9.56%
Common equity Tier 1 required | 4.50% | 4.50%
Tier 1 capital ratio | 9.55% | 9.55%
Tier 1 capital ratio required | 6.00% | 6.00%
Total capital ratio | 10.97% | 10.97%
Total capital ratio required | 8.00% | 8.00%
Oppenheimer Investments Asia [Member] |  |
Regulatory Capital Requirements [Line Items] |  |
Initial capital | $ 3,000,000 | $ 3,000,000
Net capital in excess of minimum required | 2,600,000 | 2,600,000
Initial required capital | $ 387,000 | $ 387,000

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- Definition Common Equity Tier One Ratio required for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
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- Definition Common Equity Tier 1 Ratio calculated for capital adequacy purposes under the Capital Requirements Directive (DRD IV) in the European Union. + References No definition available. + Details
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- Definition Percentage of net capital to aggregate indebtedness. + References No definition available. + Details
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- Definition The amount of net capital in excess of the alternative minimum required net capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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