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Related Party Transactions - Narratives (Details)
$ in Thousands
1 Months Ended 12 Months Ended
May 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
lease
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Mar. 30, 2019
USD ($)
Related Party Transaction          
Gain on sale of business   $ 2,814 $ 0 $ 0  
VPI          
Related Party Transaction          
Operating lease assets   3,739     $ 3,739
Affiliated Entity          
Related Party Transaction          
Unrecorded unconditional purchase obligation $ 7,000        
Unrecorded unconditional purchase obligation, amount remaining   4,100      
Sales Of Subsidiary | Affiliated Entity | Board Of Directors Member          
Related Party Transaction          
Proceeds from the divestiture of business $ 6,500        
Gain on sale of business   $ 2,800      
Acquired Lease | Affiliated Entity | VPI          
Related Party Transaction          
Number of operating leases | lease   2      
Operating lease assets   $ 3,900     $ 3,600