Notes Payable (Schedule og Long-term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Note payable	$ 54,174	$ 56,034
Notes payable, unamortized discount	1,492	1,093
Fair value of notes payable	50,416	53,102
Notes payable to clearing firm under forgivable loan
Debt Instrument [Line Items]
Note payable	6,429	10,356
Note payable to a subsidiary of Premier Trust's former shareholder
Debt Instrument [Line Items]
Note payable	0	200
Notes payable to finance business acquisition
Debt Instrument [Line Items]
Note payable	17,804	29,201
Notes payable, unamortized discount	172	627
Note payable under term loan with bank
Debt Instrument [Line Items]
Note payable	564	951
Note payable under subsidiary's revolver with bank
Debt Instrument [Line Items]
Note payable	950	455
Notes payable by subsidiary to certain former Highland shareholders
Debt Instrument [Line Items]
Note payable	6,738	6,737
Notes payable to KMS' former shareholders
Debt Instrument [Line Items]
Note payable	5,711	7,534
Notes payable, unamortized discount	343	466
Notes payable to SSN's former shareholders
Debt Instrument [Line Items]
Note payable	15,378	0
Notes payable, unamortized discount	977
Other
Debt Instrument [Line Items]
Note payable	$ 600	$ 600