Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

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Acquisitions (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Nov. 30, 2018
Oct. 31, 2018
Aug. 31, 2018
Dec. 31, 2016
Sep. 30, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Business Acquisition [Line Items]                  
Contingent consideration payable           $ 2,230 $ 2,104    
Goodwill       $ 124,031   126,079 124,210 $ 124,031 $ 124,210
Acquisition-related expenses           $ 1,010 3,469 $ 1,357  
Wall Street Financial Group                  
Business Acquisition [Line Items]                  
Consideration transferred         $ 3,468        
Cash paid in acquisition         1,192        
Contingent consideration payable         $ 2,276        
Period following closing         3 years        
Identifiable intangible assets         $ 3,070        
Goodwill         $ 398        
Foothill Securities, Inc                  
Business Acquisition [Line Items]                  
Consideration transferred       5,571          
Cash paid in acquisition       $ 2,905          
Contingent consideration payable             2,666    
Period following closing       3 years          
Identifiable intangible assets             4,640    
Goodwill             $ 931    
Kestler Financial Group                  
Business Acquisition [Line Items]                  
Consideration transferred   $ 1,167 $ 7,926            
Cash paid in acquisition   537 1,683            
Contingent consideration payable   630 619            
Identifiable intangible assets     7,083            
Goodwill     2,010            
Cash payment to be made on first anniversary     165            
Notes payable-long term     5,450            
Additional liabilities     $ 9            
Contingent consideration fair value   0              
Acquisition-related expenses   271              
Cash payment to be made on each anniversary of closing date   $ 266              
Earn out period 5 years                
Four Seasons Financial Group                  
Business Acquisition [Line Items]                  
Consideration transferred $ 2,345                
Cash paid in acquisition $ 450                
Period following closing 2 years                
Identifiable intangible assets $ 1,945                
Goodwill 400                
Notes payable-long term 372                
Contingent consideration fair value 622                
Cash payment to be made on each anniversary of closing date $ 450