Annual report pursuant to Section 13 and 15(d)

Notes Receivable from Financial Advisors (Detail)

v3.6.0.2
Notes Receivable from Financial Advisors (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for doubtful accounts $ 371 $ 461  
Minimum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan amortized over forgiveness period 3 years    
Maximum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Percentage bearing variable interest rate 10.00%    
Loan amortized over forgiveness period 5 years    
Securities America Financial Advisor      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans receivable     $ 20,000