Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements (Details)

v3.4.0.3
Net Capital Requirements (Details)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Net Capital Requirements [Line Items]    
Stockholder's equity $ 370,227,000 $ 376,031,000
Securities America    
Net Capital Requirements [Line Items]    
Regulatory net capital 8,992,000  
Securities America | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Triad    
Net Capital Requirements [Line Items]    
Regulatory net capital 10,352,000  
Triad | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement 250,000  
Investacorp Inc    
Net Capital Requirements [Line Items]    
Regulatory net capital 5,077,000  
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 6,599,000  
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 16,887,000  
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 5,791,000  
Alternative excess amount over net capital requirement $ 4,871,000  
Indebtedness to net capital 2.38  
Securities Service Network, Inc. (SSN) | Minimum    
Net Capital Requirements [Line Items]    
Alternative minimum net capital requirement $ 920,000  
Premier | Regulatory requirements    
Net Capital Requirements [Line Items]    
Stockholder's equity 1,506,000  
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