| Schedule of Other Assets | 
 
 Other Assets 
 Other assets consisted of the following (in thousands): 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 |  |  | Current December 31,
 |  |  | Non-Current December 31,
 |  |  
 |  |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |  |  
 | 
 Due from independent contractors, net (1) (2) |  | $ | 2,545 |  |  | $ | 1,577 |  |  | $ | 7,358 |  |  | $ | 1,820 |  |  
 | 
 Security deposits |  |  | — |  |  |  | — |  |  |  | 1,425 |  |  |  | 1,240 |  |  
 | 
 Employee notes receivable (3) |  |  | 224 |  |  |  | 216 |  |  |  | 158 |  |  |  | 162 |  |  
 | 
 Customer trust accounts and other |  |  | 2,367 |  |  |  | 1,262 |  |  |  | 175 |  |  |  | 222 |  |  
 |  |  |   |   |  |  |   |   |  |  |   |   |  |  |   |   |  |  
 |  |  | $ | 5,136 |  |  | $ | 3,055 |  |  | $ | 9,116 |  |  | $ | 3,444 |  |  
 |  |  |   |   |  |  |   |   |  |  |   |   |  |  |   |   |  |  
   
 
 | (1) | Represents amounts advanced, notes
 receivable and other receivables due from the Company’s
 investment sales and financing professionals. The notes receivable
 along with interest, are typically collected from future
 commissions and are generally due in one to five years. As of
 December 31, 2015 and 2014, the weighted average interest rate
 for notes receivable due from the Company’s investment sales
 and financing professionals was approximately 2.9% and 2.8%,
 respectively. Any cash receipts on notes are applied first to
 unpaid principal balance prior to any income being recognized. |  
 
 | (2) | Includes allowance for doubtful
 accounts related to current receivables of $359 and $193 as of
 December 31, 2015 and 2014, respectively. The Company recorded
 a provision for bad debt expense of $281, $29 and $207 and wrote
 off $115, $59 and $152 of these receivables for the years ended
 December 31, 2015, 2014 and 2013, respectively. |  
 
 | (3) | See Note 7 –
 “Related-Party Transactions” for additional
 information. |  | 
| Components of Deferred Compensation and Commissions | 
 
 Deferred compensation and commissions consisted of the following
 (in thousands): 
   
 
 |  |  |  |  |  |  |  |  |  |  
 |  |  | December 31, |  |  
 |  |  | 2015 |  |  | 2014 |  |  
 | 
 SARs liability |  | $ | 21,399 |  |  | $ | 20,542 |  |  
 | 
 Commissions payable to investment sales and financing
 professionals |  |  | 17,015 |  |  |  | 12,176 |  |  
 | 
 Deferred compensation liability |  |  | 5,264 |  |  |  | 3,863 |  |  
 |  |  |   |   |  |  |   |   |  |  
 |  |  | $ | 43,678 |  |  | $ | 36,581 |  |  
 |  |  |   |   |  |  |   |   |  |  | 
| Summary of Net Change in Carrying Value of Assets Held in Rabbi Trust and Deferred Compensation Obligation | 
 
 The net change in the carrying value of the assets held in the
 rabbi trust and the net change in the carrying value of the
 deferred compensation obligation, each exclusive of additional
 contributions, distributions and trust expenses consisted of the
 following (in thousands): 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 |  |  | December 31, |  |  
 |  |  | 2015 |  |  | 2014 |  |  | 2013 |  |  
 | 
 (Decrease) increase in the carrying value of the assets held in the
 rabbi trust (1) |  | $ | (57 | ) |  | $ | 290 |  |  | $ | 495 |  |  
 |  |  |   |   |  |  |   |   |  |  |   |   |  |  
 | 
 (Decrease) increase in the carrying value of the deferred
 compensation obligation (2) |  | $ | (67 | ) |  | $ | 313 |  |  | $ | 504 |  |  
 |  |  |   |   |  |  |   |   |  |  |   |   |  |  
   
 
 | (1) | Recorded in other income (expense),
 net in the consolidated statements of net and comprehensive
 income. |  
 
 | (2) | Recorded in selling, general and
 administrative expense in the consolidated statements of net and
 comprehensive income. |  |