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Rental Activity
12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Rental Activity Rental ActivityWe rent natural gas compressor packages to entities in the petroleum industry.  These rental arrangements are classified as operating leases and generally have original terms of six months to sixty months and continue on a month-to-month basis thereafter. 
Future minimum rent payments for arrangements not on a month-to-month basis at December 31, 2019 are as follows:
Years Ending December 31,
(in thousands)
2020 25,924  
2021 18,489  
2022 16,310  
2023 12,507  
2024 9,788  
Thereafter 2,366  
Total 85,384