XML 68 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Regulatory Requirements - Narrative (Details)
9 Months Ended
Sep. 30, 2017
USD ($)
Oppenheimer [Member]  
Regulatory Capital Requirements [Line Items]  
Two Percent of Debit Items $ 0
Aggregate indebtedness 13.05%
Excess capital $ 116,700,000
Net Capital as Reported in Entity's Part II Unaudited FOCUS Report $ 137,800,000
Freedom [Member]  
Regulatory Capital Requirements [Line Items]  
Aggregate indebtedness 6.67%
Freedom maintain net capital equal to the greater $ 100,000
Net Capital as Reported in Entity's Part II Unaudited FOCUS Report 5,400,000
Excess Net Capital at 1500 Percent $ 5,300,000
Oppenheimer Europe Ltd [Member] | Basel Three New Requirements [Member]  
Regulatory Capital Requirements [Line Items]  
Common equity Tier 1 capital ratio 11.87%
Common equity Tier 1 required 4.50%
Tier 1 capital ratio 11.87%
Tier 1 capital ratio required 6.00%
Total capital ratio 13.39%
Total capital ratio required 8.00%
Oppenheimer Investments Asia [Member]  
Regulatory Capital Requirements [Line Items]  
Initial capital $ 1,900,000
Excess Liquid Capital under Hong Kong SFC Rules 1,500,000
Initial required capital $ 387,000