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Discontinued Operations - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2016
Jun. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Liabilities retained after sale     $ 0 $ 0  
Assets related to discontinued operations     $ 0 $ 0  
USI Insurance Services | Discontinued operations disposed of by sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain on sale of subsidiary $ 6,900        
Liabilities retained after sale         $ 424
Proceeds from sale $ 7,000        
Earn-out payment   $ 600      
Earn-out payment received   $ 575