Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements (Details)

v3.7.0.1
Net Capital Requirements (Details)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity $ 352,137,000 $ 362,474,000
Securities America    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Regulatory net capital 3,329,000  
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 12,216,000  
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 7,385,000  
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 6,523,000  
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 19,194,000  
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 810,000  
Regulatory net capital 7,302,000  
Alternative excess amount over net capital requirement $ 6,492,000  
Indebtedness to net capital 1.66  
Securities Service Network, Inc. (SSN) | Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Alternative minimum net capital requirement $ 810,000  
Premier    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Stockholder's equity 1,942,000  
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