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Revenue from Contract with Customers (Tables)
9 Months Ended
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands):

 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
Contract operations (1):
 
 
 
 
 
 
 
0 - 1,000 horsepower per unit
$
66,026

 
$
60,725

 
$
193,448

 
$
179,917

1,001 - 1,500 horsepower per unit
81,755

 
69,663

 
231,693

 
204,841

Over 1,500 horsepower per unit
49,572

 
38,053

 
138,966

 
108,367

Other (2)
984

 
1,068

 
2,995

 
3,031

Total contract operations (3)
198,337

 
169,509

 
567,102

 
496,156

 
 
 
 
 
 
 
 
Aftermarket services (1):
 
 
 
 
 
 
 
Services (4)
28,888

 
38,863

 
95,689

 
107,776

OTC parts and components sales
17,724

 
24,000

 
56,707

 
67,350

Total aftermarket services (5)
46,612

 
62,863

 
152,396

 
175,126

 
 
 
 
 
 
 
 
Total revenue
$
244,949

 
$
232,372

 
$
719,498

 
$
671,282

——————
(1) 
We operate in two segments: contract operations and aftermarket services. See Note 21 (“Segments”) for further details.
(2) 
Primarily relates to fees associated with owned non-compressor equipment.
(3) 
Included $1.6 million for each of the three months ended September 30, 2019 and 2018 and $6.0 million and $4.3 million for the nine months ended September 30, 2019 and 2018, respectively, related to billable maintenance on owned units that was recognized at a point in time. All other contract operations revenue is recognized over time.
(4) 
Included a reversal of $0.7 million of revenue during the three and nine months ended September 30, 2019 related to changes in estimates of performance obligations partially satisfied in prior periods.
(5) 
All service revenue within aftermarket services is recognized over time. All OTC parts and components sales revenue is recognized at a point in time.
Remaining Performance Obligation The remaining performance obligations will be recognized through 2024 as follows (in thousands):

 
2019
 
2020
 
2021
 
2022
 
2023
 
2024
 
Total
Remaining performance obligations
$
114,677

 
$
198,753

 
$
100,244

 
$
34,878

 
$
4,090

 
$
563

 
$
453,205