Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Narrative (Details)

v3.10.0.1
Notes Payable - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 09, 2018
Jun. 22, 2018
May 22, 2018
Dec. 12, 2017
Nov. 21, 2017
Apr. 21, 2017
Jul. 31, 2018
Jun. 30, 2018
May 31, 2018
Feb. 28, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Aug. 31, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]                                
Notes payable, debt issuance costs                     $ 7,191,000   $ 7,191,000     $ 3,412,000
Commissions                     $ 172,108,000 $ 131,467,000 $ 515,775,000 $ 394,492,000    
Extinguishment of debt             $ 14,978,000                  
Amended and Restated Loan Agreement | Securities America | Term Loan                                
Line of Credit Facility [Line Items]                                
Face amount of debt           $ 8,000,000                    
Interest rate           5.75%                    
6.5% Senior notes | Senior Notes                                
Line of Credit Facility [Line Items]                                
Face amount of debt       $ 76,569,000 $ 72,500,000                      
Interest rate         6.50%           6.50%   6.50%      
Redemption percentage         100.00%                      
Option to exercise amount       4,069,000                        
Notes payable, debt issuance costs       3,313,000                        
Commissions       $ 1,187,000                        
Debt sold                   $ 25,000,000     $ 6,240,000      
Commissions receivable, percentage         2.00%                      
7% Senior Notes | Senior Notes                                
Line of Credit Facility [Line Items]                                
Face amount of debt   $ 41,412,000 $ 40,000,000                          
Interest rate     7.00%               7.00%   7.00%      
Redemption percentage     100.00%                          
Option to exercise amount   1,412,000                            
Notes payable, debt issuance costs   1,656,000                            
Commissions   $ 527,000                            
Debt sold               $ 25,000,000         $ 2,729,000      
Commissions receivable, percentage     2.00%                          
7.25% Senior Notes | Senior Notes                                
Line of Credit Facility [Line Items]                                
Face amount of debt $ 60,000,000                              
Interest rate 7.25%                   7.25%   7.25%      
Redemption percentage 100.00%                              
Notes payable, debt issuance costs $ 1,890,000                              
Commissions 100,000                              
Proceeds from issuance of debt $ 60,000,000                              
Notes payable to Kestler Financial Group's former shareholders | Notes Payable | Kestler Financial Group                                
Line of Credit Facility [Line Items]                                
Face amount of debt                             $ 5,450,000  
Interest rate                             4.00%  
Interest expense on note                     $ 18,000          
Revolving Credit Facility                                
Line of Credit Facility [Line Items]                                
Availability under revolving credit facility                     40,000,000   $ 40,000,000      
Face amount of debt                     40,000,000   40,000,000      
Revolving Credit Facility | Amended and Restated Loan Agreement | Securities America | Line of Credit                                
Line of Credit Facility [Line Items]                                
Availability under revolving credit facility                     1,000,000   1,000,000      
Basis spread on variable rate           2.25%                    
NFS Forgivable Loan                                
Line of Credit Facility [Line Items]                                
Term                 6 years              
Forgiveness, principal                 $ 2,222,000              
Fair Value | Level 2                                
Line of Credit Facility [Line Items]                                
Notes payable, net                     $ 194,131,000   $ 194,131,000     $ 99,129,000