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Revenue from Contracts with Customer - Performance Obligation (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation amount $ 179,900  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation amount   $ 213,145
Remaining performance obligation, percent to be recognized over next twelve months   96.20%
Remaining performance obligation expected timing of satisfaction period   12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining performance obligation, percent to be recognized over next twelve months 96.50%  
Remaining performance obligation expected timing of satisfaction period 12 months