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Basis of Presentation - Depreciation (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Jan. 01, 2022	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Depreciation
Net (loss) income			$ (1,674)	$ 5,848
Basic (in dollars per share)			$ (0.03)	$ 0.12
Diluted (in dollars per share)			$ (0.03)	$ 0.12
Change in Accounting Method Accounted for as Change in Estimate [Member]
Depreciation
Depreciation expense			$ (5,800)
Net (loss) income			$ 4,200
Basic (in dollars per share)			$ 0.08
Diluted (in dollars per share)			$ 0.08
Minimum | Construction equipment
Depreciation
Estimated useful lives of the equipment		3 years
Minimum | Change in Accounting Method Accounted for as Change in Estimate [Member] | Construction equipment
Depreciation
Estimated useful lives of the equipment	3 years
Maximum | Construction equipment
Depreciation
Estimated useful lives of the equipment		7 years
Maximum | Change in Accounting Method Accounted for as Change in Estimate [Member] | Construction equipment
Depreciation
Estimated useful lives of the equipment	10 years

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

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- Details

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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=prim_ConstructionEquipmentMember
Namespace Prefix:
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- Details

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