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Capitalized Software Development Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Capitalized Software Development Costs [Line Items]      
Capitalized Computer Software, Additions $ 1,740 $ 622  
Capitalized Software Development Costs for Software Sold to Customers 12,905   $ 11,742
Capitalized Computer Software, Amortization $ 596 $ 525  
Property and Casualty Exchange [Member]      
Capitalized Software Development Costs [Line Items]      
Capitalized Computer Software, amortization period 5 years    
Minimum [Member] | Continuing Medical Education Products [Member]      
Capitalized Software Development Costs [Line Items]      
Capitalized Computer Software, amortization period 3 years    
Maximum [Member] | Continuing Medical Education Products [Member]      
Capitalized Software Development Costs [Line Items]      
Capitalized Computer Software, amortization period 5 years