Quarterly report pursuant to Section 13 or 15(d)

Revenue - Obligation (Details)

v3.20.1
Revenue - Obligation (Details)
$ in Thousands
Mar. 31, 2020
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 575,009
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 169,680
Remaining Performance Obligations  
Revenue recognition period 9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 166,469
Remaining Performance Obligations  
Revenue recognition period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 121,386
Remaining Performance Obligations  
Revenue recognition period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 57,523
Remaining Performance Obligations  
Revenue recognition period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 32,908
Remaining Performance Obligations  
Revenue recognition period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 27,043
Remaining Performance Obligations  
Revenue recognition period