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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]          
Goodwill $ 18,476   $ 18,476   $ 17,684
Goodwill, Translation Adjustments     792    
Finite-Lived Intangible Assets, Accumulated Amortization (1,403)   (1,403)   (1,359)
Intangible Assets, Net 140   140    
Intangible Assets, Gross 2,793   2,793   2,793
Intangible Assets, Net 1,390   1,390   $ 1,434
Amortization of Intangible Assets 22 $ 22 $ 44 $ 44  
Remaining Amortization Period     18   24
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]          
2017 45   $ 45    
2018 95   95    
Total 140   140    
Client Relationships          
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 1,543   1,543   $ 1,543
Finite-Lived Intangible Assets, Accumulated Amortization (1,403)   (1,403)   (1,359)
Intangible Assets, Net 140   140   184
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]          
Total 140   140   184
Mutual Fund Management Contracts          
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]          
Indefinite-lived Intangible Assets $ 1,250   $ 1,250   $ 1,250