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Contract Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Schedule of Components of Contract Asset and Liability Balances | The components of the contract asset balances as of the respective dates were as follows:
(in thousands) | December 31, 2020 |  | December 31, 2019 |  | Change
Contract assets |  |  |  |  |
Costs in excess of billings and estimated earnings | $ | 31,894 |  |  | $ | 44,315 |  |  | $ | (12,421) |
Retainage receivable | 35,204 |  |  | 32,873 |  |  | 2,331 |
Total contract assets | $ | 67,098 |  |  | $ | 77,188 |  |  | $ | (10,090) |
The components of the contract liability balances as of the respective dates were as follows:
(in thousands) | December 31, 2020 |  | December 31, 2019 |  | Change
Contract liabilities |  |  |  |  |
Billings in excess of costs and estimated earnings | $ | 46,020 |  |  | $ | 40,662 |  |  | $ | 5,358 |
Provisions for losses | 628 |  |  | 1,708 |  |  | (1,080) |
Total contract liabilities | $ | 46,648 |  |  | $ | 42,370 |  |  | $ | 4,278 |
Schedule of Contracts in Progress | The net underbilling (overbilling) position for contracts in process consisted of the following:
(in thousands) | December 31, 2020 |  | December 31, 2019
Revenue earned on uncompleted contracts | $ | 752,564 |  |  | $ | 726,215 |
Less: Billings to date | (766,690) |  |  | (722,562) |
Net underbilling (overbilling) | $ | (14,126) |  |  | $ | 3,653 |
(in thousands) | December 31, 2020 |  | December 31, 2019
Costs in excess of billings and estimated earnings | $ | 31,894 |  |  | $ | 44,315 |
Billings in excess of costs and estimated earnings | (46,020) |  |  | (40,662) |
Net underbilling (overbilling) | $ | (14,126) |  |  | $ | 3,653 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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