Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements (Details)

v3.7.0.1
Net Capital Requirements (Details)
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity $ 357,101,000 $ 362,474,000
Securities America    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 11,052,000  
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 7,039,000  
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 7,242,000  
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 6,282,000  
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 23,425,000  
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 846,000  
Regulatory net capital 5,843,000  
Alternative excess amount over net capital requirement $ 4,997,000  
Indebtedness to net capital 2.17  
Securities Service Network, Inc. (SSN) | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement $ 846,000  
Premier    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity 1,934,000  
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