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Revenue Recognition | 9 Months Ended
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Sep. 30, 2019
Revenue Recognition |
Revenue Recognition | (11) Revenue Recognition ​ On January 1, 2018, we adopted ASC Topic 606 using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. ​ We identified no material impact on our historical revenues upon initial application of ASC Topic 606, and as such did not recognize any cumulative catch-up effect to the opening balance of our partners’ capital as of January 1, 2018. Additionally, the application of ASC Topic 606 had no material impact on any financial statement line items. ​ The following table disaggregates our revenue by type of service (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018
Contract operations revenue | ​ | $ | 169,911 | ​ | $ | 162,895 | ​ | $ | 507,194 | ​ | $ | 396,134
Retail parts and services revenue | ​ | ​ | 5,845 | ​ | ​ | 6,052 | ​ | ​ | 12,983 | ​ | ​ | 16,241
Total revenues | ​ | $ | 175,756 | ​ | $ | 168,947 | ​ | $ | 520,177 | ​ | $ | 412,375
​ The following table disaggregates our revenue by timing of provision of services or transfer of goods (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018
Services provided or goods transferred at a point in time | ​ | $ | 5,845 | ​ | $ | 6,052 | ​ | $ | 12,983 | ​ | $ | 16,241
Services provided over time: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Primary term | ​ | ​ | 114,121 | ​ | ​ | 84,620 | ​ | ​ | 316,809 | ​ | ​ | 199,027
Month-to-month | ​ | ​ | 55,790 | ​ | ​ | 78,275 | ​ | ​ | 190,385 | ​ | ​ | 197,107
Total revenues | ​ | $ | 175,756 | ​ | $ | 168,947 | ​ | $ | 520,177 | ​ | $ | 412,375
​ Contract assets and trade accounts receivable ​ We record contract assets when we have completed performance under a contract but our right to consideration is not yet unconditional. We had no contract assets as of September 30, 2019 and December 31, 2018. There were no significant changes to our trade accounts receivable balances due to contract modifications or adjustments, or changes in time frame for a right to consideration to become unconditional during the period. ​ Deferred revenue ​ We record deferred revenue when cash payments are received or due in advance of our performance. The increase in the deferred revenue balance for the nine months ended September 30, 2019 is primarily driven by cash payments received or due in advance of satisfying our performance obligations under a contract. There was no significant change to our deferred revenue balance as a result of changes in time frame for a performance obligation to be satisfied during the period. ​ Practical expedients and exemptions ​ We have elected to apply the practical expedient in ASC 606-10-50-14 and as such do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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