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Revenue Recognition (Tables)
 3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue
The following table disaggregates our revenue by type of service (in thousands):
Three Months Ended March 31,
20222021
Contract operations revenue$161,486 $155,469 
Retail parts and services revenue1,926 2,044 
Total revenues$163,412 $157,513 
The following table disaggregates our revenue by timing of provision of services or transfer of goods (in thousands):
Three Months Ended March 31,
20222021
Services provided over time:
Primary term$108,297 $106,561 
Month-to-month53,189 48,908 
Total services provided over time161,486 155,469 
Services provided or goods transferred at a point in time1,926 2,044 
Total revenues$163,412 $157,513 
Summary of deferred revenue Components of deferred revenue were as follows (in thousands):
Balance sheet locationMarch 31,
2022		December 31,
2021
Current (1)Deferred revenue$51,853 $51,216 
NoncurrentOther liabilities4,740 4,823 
Total$56,593 $56,039 
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(1)We recognized $42.1 million of revenue during the three months ended March 31, 2022 related to our deferred revenue balance as of December 31, 2021.
Expected timing of recognizing remaining performance obligations We expect to recognize these remaining performance obligations as follows (in thousands):
2022 (remainder)
202320242025ThereafterTotal
Remaining performance obligations$236,615 $126,839 $46,478 $17,181 $10,140 $437,253