Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements (Details)

v3.5.0.2
Net Capital Requirements (Details)
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Net Capital Requirements [Line Items]    
Stockholder's equity $ 350,484,000 $ 376,002,000
Securities America    
Net Capital Requirements [Line Items]    
Regulatory net capital 9,639,000  
Securities America | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Triad    
Net Capital Requirements [Line Items]    
Regulatory net capital 10,018,000  
Triad | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Investacorp Inc    
Net Capital Requirements [Line Items]    
Regulatory net capital 5,844,000  
Investacorp Inc | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
KMS Financial Services, Inc. (KMS)    
Net Capital Requirements [Line Items]    
Regulatory net capital 6,132,000  
KMS Financial Services, Inc. (KMS) | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Ladenburg    
Net Capital Requirements [Line Items]    
Regulatory net capital 16,584,000  
Ladenburg | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Securities Service Network, Inc. (SSN)    
Net Capital Requirements [Line Items]    
Regulatory net capital 5,961,000  
Alternative excess amount over net capital requirement $ 5,169,000  
Indebtedness to net capital 1.99  
Securities Service Network, Inc. (SSN) | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement $ 792,000  
Premier | Regulatory requirements    
Net Capital Requirements [Line Items]    
Stockholder's equity 1,487,000  
Premier | Minimum | Cash    
Net Capital Requirements [Line Items]    
Stockholder's equity 250,000  
Premier | Minimum | Regulatory requirements    
Net Capital Requirements [Line Items]    
Stockholder's equity 1,000,000  
Premier | Minimum | Regulatory requirements | Cash    
Net Capital Requirements [Line Items]    
Stockholder's equity $ 250,000