|3 Months Ended|
Mar. 31, 2022
|Revenue from Contract with Customer [Abstract]|
Disaggregation of Revenues
Our revenues are derived from the delivery of products to our customers and from services performed for commercial customers, various government agencies, the United States Department of Defense ("DoD") or federal civilian agencies.
Revenues by customer for our each of our operating segments for the three months ended March 31, 2022 and 2021 were as follows (in thousands):
Revenues by type for our each of our operating segments for the three months ended March 31, 2022 and 2021 were as follows (in thousands):
Unbilled receivables (contract assets) represent our right to consideration in exchange for goods or services that we have transferred to the customer prior to us having the right to payment for such goods or services. Contract liabilities are recorded when customers remit contractual cash payments in advance of us satisfying related performance obligations under contractual arrangements, including those with performance obligations to be satisfied over a period of time.
We present our unbilled receivables and contract liabilities on a contract-by-contract basis. If a contract liability exists, it is netted against the unbilled receivables balance for that contract. Unbilled receivables were $31.2 million as of March 31, 2022 and $31.9 million as of December 31, 2021. Contract liabilities, which are included in accrued expenses and other current liabilities in our consolidated balance sheets, were $7.4 million as of March 31, 2022 and $7.1 million as of December 31, 2021. For the three months ended March 31, 2022 and 2021, we recognized revenue that was previously included in the beginning balance of contract liabilities of $2.1 million and $0.9 million, respectively.
Our performance obligations are satisfied either at a point in time or over time as work progresses. Revenues from products and services transferred to customers at a point in time accounted for approximately 60% and 49% of our revenues for the three months ended March 31, 2022 and 2021, respectively, primarily related to the sale of vehicle and aircraft parts in our Fleet and Aviation segments. Revenues from products and services transferred to customers over time accounted for approximately 40% and 51% of our revenues for the three months ended March 31, 2022 and 2021, respectively, primarily related to revenues in our Federal and Defense segment and MRO services in our Aviation segment.
As of March 31, 2022, the aggregate amount of transaction prices allocated to unsatisfied or partially unsatisfied performance obligations was $198 million. The performance obligations expected to be satisfied within one year and greater than one year are 92% and 8%, respectively. We have applied the practical expedient for certain parts sales and MRO services to exclude the amount of remaining performance obligations for (i) contracts with an original expected term of one year or less or (ii) contracts for which we recognize revenue in proportion to the amount we have the right to invoice for services performed.During the three months ended March 31, 2022 and 2021, revenue recognized from performance obligations satisfied in prior periods was not material.
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.
Reference 1: http://www.xbrl.org/2003/role/disclosureRef