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Rental Activity
12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Rental Activity Rental Activity
We 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, 2021 are as follows:
Years Ending December 31,(in thousands)
2022$29,583
202318,684
202418,277
20258,739
20262,614
Thereafter462
Total$78,359