Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements (Details)

v3.5.0.2
Net Capital Requirements (Details)
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity $ 351,300,000 $ 376,002,000
Securities America    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 8,602,000  
Securities America | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 250,000  
Triad    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 10,796,000  
Triad | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 250,000  
Investacorp Inc    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 5,719,000  
Investacorp Inc | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 250,000  
KMS Financial Services, Inc. (KMS)    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 4,685,000  
KMS Financial Services, Inc. (KMS) | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 250,000  
Ladenburg    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 17,210,000  
Ladenburg | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 250,000  
Securities Service Network, Inc. (SSN)    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement 804,000  
Regulatory net capital 6,030,000  
Alternative excess amount over net capital requirement $ 5,226,000  
Indebtedness to net capital 2.00  
Securities Service Network, Inc. (SSN) | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement $ 804,000  
Premier    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity 1,648,000  
Premier | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity 1,000,000  
Premier | Minimum | Cash    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity $ 250,000