INTEREST EXPENSE AND SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Cash and Cash Equivalents Reconciliation (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended	12 Months Ended
		Feb. 01, 2022	Feb. 28, 2022	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Jan. 31, 2022	Dec. 31, 2021	Dec. 15, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	[1]			$ 65,335	$ 65,335	$ 76,728		$ 224,874
Restricted cash and cash equivalents				6,034	6,034	36,732		1,841
Cash, cash equivalents and restricted cash at end of period				71,369	71,369	113,460		226,715		$ 67,423
Escrow deposit									$ 11,400
Cash held at discontinued operations				30	30	490		0
Fossil Power Systems, Inc
Cash and Cash Equivalents [Line Items]
Business combination, consideration transferred		$ 59,200	$ 59,200	2,800	2,900
Held by foreign entities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents				44,388	44,388	46,640		42,070
Held by U.S. entities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents				20,947	20,947	30,088		182,804
Reinsurance reserve requirements
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents				380	380	447		443
Restricted foreign accounts
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents						0		0
Project indemnity collateral
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents				0	0	5,723		0
Additional amount of restricted cash and cash equivalents							$ 5,700
Bank guarantee collateral
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents				1,823	1,823	2,072		997
Letters of credit collateral
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents				584	584	11,193		401
Additional amount of restricted cash and cash equivalents				10,000	10,000
Hold-back for acquisition purchase price
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents		$ 5,900		2,950	2,950	5,900		0
Escrow for long-term project
Cash and Cash Equivalents [Line Items]
Restricted cash and cash equivalents				$ 297	$ 297	$ 11,397		$ 0

[1] (1) Includes cash held at discontinued operations of $0.03 million, $0.49 million and $0.00 million at December 31, 2023, 2022 and 2021, respectively.