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Rental Activity
12 Months Ended
Dec. 31, 2020
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, 2020 are as follows:
Years Ending December 31,(in thousands)
2021$21,565
202215,084
202313,763
20248,590
20255,845
Thereafter13,880
Total$78,727