Annual report pursuant to section 13 and 15(d)

Intangible Assets (Intangible Assets Subject To Amortization) (Detail)

v2.4.0.8
Intangible Assets (Intangible Assets Subject To Amortization) (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 8 years 0 months 15 days  
Gross Carrying Amount $ 113,453 $ 113,596
Accumulated Amortization 37,202 25,608
Technology [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 21,422 21,422
Accumulated Amortization 6,359 3,621
Technology [Member] | Minimum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 1 year  
Technology [Member] | Maximum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 7 years 8 months 12 days  
Relationships With Financial Advisors [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 68,688 68,688
Accumulated Amortization 17,554 11,523
Relationships With Financial Advisors [Member] | Minimum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 9 years 2 months 12 days  
Relationships With Financial Advisors [Member] | Maximum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 20 years  
Relationships With Financial Advisors [Member] | Weighted Average [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 10 years 2 months 12 days  
Vendor Relationship [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 7 years  
Gross Carrying Amount 3,613 3,613
Accumulated Amortization 2,998 2,482
Covenants Not-to-Compete [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,773 1,773
Accumulated Amortization 1,735 1,551
Covenants Not-to-Compete [Member] | Minimum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 2 years 2 months 12 days  
Covenants Not-to-Compete [Member] | Maximum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 5 years  
Customer Account [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 2,029 2,029
Accumulated Amortization 1,266 1,017
Customer Account [Member] | Minimum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 6 years 10 months 24 days  
Customer Account [Member] | Maximum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 10 years  
Trade Names [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 12,290 12,290
Accumulated Amortization 3,716 2,002
Trade Names [Member] | Minimum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 7 years 2 months 12 days  
Trade Names [Member] | Maximum [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 10 years  
Relationships With Investment Banking Clients [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 4 years  
Gross Carrying Amount 2,586 2,586
Accumulated Amortization 2,586 2,586
Leases [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 6 years 4 months 24 days  
Gross Carrying Amount 861 1,004
Accumulated Amortization 861 730
Referral Agreement [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 6 years 7 months 6 days  
Gross Carrying Amount 124 124
Accumulated Amortization 64 43
Other (Member)
    
Indefinite-lived Intangible Assets [Line Items]    
Estimated Useful Life 6 years  
Gross Carrying Amount 67 67
Accumulated Amortization $ 63 $ 53