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Construction Contracts | 3 Months Ended
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Mar. 31, 2021
Contractors [Abstract] |
Construction Contracts | Construction Contracts Construction contract costs and estimated earnings in excess of billings represent reimbursable costs and amounts earned under contracts in progress as of the balance sheet date. Such amounts become billable according to contract terms, which usually consider the passage of time, achievement of certain milestones, or completion of the project. The Company expects to bill and collect substantially all construction contract costs and estimated earnings in excess of billings as of March 31, 2021 during the next twelve months. Billings in excess of construction contract costs and estimated earnings represent billings or collections on contracts made in advance of revenue recognized. The following table summarizes the changes to the balances in the Company’s construction contract costs and estimated earnings in excess of billings account and the billings in excess of construction contract costs and estimated earnings account for the three months ended March 31, 2021 and 2020 (in thousands):
|  | Three Months Ended March 31, 2021 |  | Three Months Ended March 31, 2020
|  | Construction contract costs and estimated earnings in excess of billings |  | Billings in excess of construction contract costs and estimated earnings |  | Construction contract costs and estimated earnings in excess of billings |  | Billings in excess of construction contract costs and estimated earnings
Beginning balance |  | $ | 138 |  |  | $ | 6,088 |  |  | $ | 249 |  |  | $ | 5,306 |
Revenue recognized that was included in the balance at the beginning of the period |  | — |  |  | (6,088) |  |  | — |  |  | (5,306) |
Increases due to new billings, excluding amounts recognized as revenue during the period |  | — |  |  | 3,143 |  |  | — |  |  | 6,311 |
Transferred to receivables |  | (138) |  |  | — |  |  | (285) |  |  | — |
Construction contract costs and estimated earnings not billed during the period |  | 54 |  |  | — |  |  | 458 |  |  | — |
Changes due to cumulative catch-up adjustment arising from changes in the estimate of the stage of completion |  | — |  |  | (81) |  |  | 36 |  |  | — |
Ending balance |  | $ | 54 |  |  | $ | 3,062 |  |  | $ | 458 |  |  | $ | 6,311 |
The Company defers pre-contract costs when such costs are directly associated with specific anticipated contracts and their recovery is probable. Pre-contract costs of $2.0 million and $1.7 million were deferred as of March 31, 2021 and December 31, 2020, respectively. Amortization of pre-contract costs for the three months ended March 31, 2021 and 2020 was $0.1 million and $0.2 million, respectively. Construction receivables and payables include retentions, amounts that are generally withheld until the completion of the contract or the satisfaction of certain restrictive conditions such as fulfillment guarantees. As of March 31, 2021 and December 31, 2020, construction receivables included retentions of $14.7 million and $17.1 million, respectively. The Company expects to collect substantially all construction receivables outstanding as of March 31, 2021 during the next twelve months. As of March 31, 2021 and December 31, 2020, construction payables included retentions of $15.3 million and $17.7 million, respectively. The Company expects to pay substantially all construction payables outstanding as of March 31, 2021 during the next twelve months. The Company’s net position on uncompleted construction contracts comprised the following as of March 31, 2021 and December 31, 2020 (in thousands):
| March 31, 2021 |  | December 31, 2020
Costs incurred on uncompleted construction contracts | $ | 939,312 |  |  | $ | 905,037 |
Estimated earnings | 33,399 |  |  | 32,130 |
Billings | (975,719) |  |  | (943,117) |
Net position | $ | (3,008) |  |  | $ | (5,950) |
Construction contract costs and estimated earnings in excess of billings | $ | 54 |  |  | $ | 138 |
Billings in excess of construction contract costs and estimated earnings | (3,062) |  |  | (6,088) |
Net position | $ | (3,008) |  |  | $ | (5,950) |
The Company’s balances and changes in construction contract price allocated to unsatisfied performance obligations (backlog) as of March 31, 2021 and 2020 were as follows (in thousands):
|  | Three Months Ended March 31, |  |
|  | 2021 |  | 2020 |  |  |  |
Beginning backlog |  | $ | 71,258 |  |  | $ | 242,622 |  |  |  |  |
New contracts/change orders |  | 3,124 |  |  | 40,440 |  |  |  |  |
Work performed |  | (35,544) |  |  | (47,420) |  |  |  |  |
Ending backlog |  | $ | 38,838 |  |  | $ | 235,642 |  |  |  |  |
The Company expects to complete a majority of the uncompleted contracts in place as of March 31, 2021 during the next 12 to 18 months.

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