Annual report pursuant to Section 13 and 15(d)

Net Capital Requirements (Details)

v3.6.0.2
Net Capital Requirements (Details)
$ in Thousands
Feb. 29, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jan. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Net Capital Requirements [Line Items]        
Stockholder's equity (at least)   $ 362,474   $ 376,002
Premier        
Net Capital Requirements [Line Items]        
Stockholder's equity (at least)   1,766    
Securities America        
Net Capital Requirements [Line Items]        
Regulatory net capital   5,192    
Triad        
Net Capital Requirements [Line Items]        
Regulatory net capital   11,262    
Capital deficiency     $ 1,579  
Payments for capital contribution $ 2,500      
Investacorp Inc        
Net Capital Requirements [Line Items]        
Regulatory net capital   7,293    
KMS        
Net Capital Requirements [Line Items]        
Regulatory net capital   5,517    
Ladenburg        
Net Capital Requirements [Line Items]        
Regulatory net capital   22,523    
SSN        
Net Capital Requirements [Line Items]        
Alternative minimum net capital requirement (at least)   821    
Regulatory net capital   7,739    
Alternative excess amount over net capital requirement   $ 6,918    
Indebtedness to net capital   1.59