Construction Contracts (Tables)

12 Months Ended

Dec. 31, 2021

Contractors [Abstract]

Summary of balances and changes of construction contracts

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 year ended December 31, 2021 and 2020 (in thousands):

	Year ended December 31, 2021				Year ended December 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	—		6,237		—		6,244
Transferred to receivables	(714)		—		(545)		—
Construction contract costs and estimated earnings not billed during the period	243		—		138		—
Changes due to cumulative catch-up adjustment arising from changes in the estimate of the stage of completion	576		(1,356)		296		(156)
Ending balance	$	243	$	4,881	$	138	$	6,088

The Company's balances and changes in construction contract price allocated to unsatisfied performance obligations (backlog) for each of the three years ended December 31, 2021, 2020 and 2019 were as follows (in thousands):

	Years Ended December 31,
	2021		2020		2019
Beginning backlog	$	71,258	$	242,622	$	165,863
New contracts/change orders	236,077		45,882		182,495
Work performed	(91,816)		(217,246)		(105,736)
Ending backlog	$	215,519	$	71,258	$	242,622

Net position of uncompleted construction contracts

The Company’s net position on uncompleted construction contracts comprised the following as of December 31, 2021 and 2020 (in thousands):

	December 31,
	2021		2020
Costs incurred on uncompleted construction contracts	$	379,993	$	461,725
Estimated earnings	15,115		13,205
Billings	(399,746)		(480,880)
Net position	$	(4,638)	$	(5,950)
Construction contract costs and estimated earnings in excess of billings	$	243	$	138
Billings in excess of construction contract costs and estimated earnings	(4,881)		(6,088)
Net position	$	(4,638)	$	(5,950)