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Contract Assets and Liabilities
 9 Months Ended
Sep. 30, 2020
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]  
Contract Assets and Liabilities Contract Assets and Liabilities
Contracts with customers usually stipulate the timing of payment, which is defined by the terms found within the various contracts under which work was performed during the period. Therefore, contract assets and liabilities are created when the timing of costs incurred on work performed does not coincide with the billing terms, which frequently include retention provisions contained in each contract.
The Company’s consolidated balance sheets present contract assets, which contain unbilled revenue and contract retainages associated with contract work that has been completed and billed but not paid by customers, pursuant to retainage provisions, that are generally due once the job is completed and approved. The allowance for doubtful accounts associated with contract assets was $0.5 million as of September 30, 2020 and $0.1 million as of December 31, 2019.
Contract assets consisted of the following:
(in thousands)September 30,
2020		December 31,
2019		Change
​​​​
Unbilled revenue, net$128,785 $126,087 $2,698 
Contract retainages, net92,806 91,022 1,784 
Contract assets, net$221,591 $217,109 $4,482 
The Company’s consolidated balance sheets present contract liabilities which contain deferred revenue and an accrual for contracts in a loss provision.
Contract liabilities consisted of the following:
(in thousands)September 30,
2020		December 31,
2019		Change
​​​​
Deferred revenue$123,301 $102,673 $20,628 
Accrued loss provision2,310 2,813 (503)
Contract liabilities$125,611 $105,486 $20,125 
The following table provides information about contract assets and contract liabilities from contracts with customers:
(in thousands)September 30,
2020		December 31,
2019		Change
​​​​
Contract assets, net$221,591 $217,109 $4,482 
Contract liabilities(125,611)(105,486)(20,125)
Net contract assets (liabilities)$95,980 $111,623 $(15,643)
The difference between the opening and closing balances of the Company’s contract assets and contract liabilities primarily results from the timing of the Company’s billings in relation to its performance of work. The amounts of revenue recognized in the period that were included in the opening contract liability balances were $31.3 million and $57.7 million for the three and nine months ended September 30, 2020, respectively. The amounts of revenue recognized in the period that were included in the opening contract liability balances were $11.9 million and $39.4 million for the three and nine months ended September 30, 2019, respectively. This revenue consists primarily of work performed on previous billings to customers.
The net asset position for contracts in process consisted of the following:
(in thousands)September 30,
2020		December 31,
2019
​​​
Costs and estimated earnings on uncompleted contracts$3,710,876 $3,532,886 
Less: billings to date3,705,392 3,509,472 
$5,484 $23,414 
The net asset position for contracts in process is included within the contract asset and contract liability in the accompanying consolidated balance sheets as follows:
(in thousands)September 30,
2020		December 31,
2019
​
Unbilled revenue $128,785 $126,087 
Deferred revenue (123,301)(102,673)
$5,484 $23,414