LEASE OBLIGATIONS - Schedule of Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Lease, Cost [Abstract]
Operating lease cost	$ 5,780	$ 5,684	$ 11,529	$ 11,375
Short-term lease cost	7,062	6,718	12,792	10,902
Finance lease cost:
Amortization of right-of-use assets	31	67	62	134
Interest on lease liabilities	8	11	16	22
Total finance lease cost	39	$ 78	78	156
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases			11,506	10,836
Operating cash flows from finance leases			16	22
Financing cash flows from finance leases			62	134
Right-of-use assets obtained in exchange for lease obligations (non-cash):
Operating leases			3,138	11,362
Finance leases			0	$ 0
Assets and Liabilities, Lessee [Abstract]
Operating lease right-of-use assets	44,470		44,470		$ 52,668
Current portion of long-term lease obligations	18,202		18,202		20,498
Long-term lease obligations	26,729		26,729		32,455
Total operating lease liabilities	44,931		44,931		52,953
Property and equipment, at cost	1,427		1,427		2,011
Accumulated depreciation	$ (1,048)		$ (1,048)		$ (1,445)
Finance lease, right-of-use asset, statement of financial position [extensible list]	Property and equipment, net		Property and equipment, net		Property and equipment, net
Property and equipment, net	$ 379		$ 379		$ 566
Finance lease, liability, current, statement of financial position [extensible list]	Current maturities of long-term debt ($20 and $0 related to VIEs)		Current maturities of long-term debt ($20 and $0 related to VIEs)		Current maturities of long-term debt ($20 and $0 related to VIEs)
Current maturities of long-term debt	$ 131		$ 131		$ 127
Finance lease, liability, noncurrent, statement of financial position [extensible list]	Long-term debt		Long-term debt		Long-term debt
Long-term debt	$ 305		$ 305		$ 372
Total finance lease liabilities	$ 436		$ 436		$ 499
Weighted average remaining lease term, operating leases	4 years 3 months 18 days		4 years 3 months 18 days		4 years 3 months 18 days
Weighted average remaining lease term, finance leases	3 years		3 years		3 years 7 months 6 days
Weighted average discount rate, operating leases	6.00%		6.00%		6.00%
Weighted average discount rate, finance leases	6.90%		6.90%		6.90%

STERLING INFRASTRUCTURE, INC. 10-Q