Revenue- Segment Cost of Construction (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue
Cost of Construction	$ 210,068	$ 224,425	$ 630,093	$ 783,635
% of Total Cost of Construction	100.00%	100.00%	100.00%	100.00%
Civil
Revenue
Cost of Construction	$ 89,054	$ 74,185	$ 236,264	$ 210,796
% of Total Cost of Construction	42.40%	33.10%	37.50%	26.90%
Transportation
Revenue
Cost of Construction	$ 121,014	$ 150,240	$ 393,829	$ 572,839
% of Total Cost of Construction	57.60%	66.90%	62.50%	73.10%

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
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-Topic 606
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-Topic 606
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+ Details

Southland Holdings, Inc. 10-Q