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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill consisted of the following:
Industrial OperationsEnergy OperationsManufacturing OperationsTotal
(In thousands)
Balance at December 31, 2024$7,541 $1,449 $20,349 $29,339 
Effect of foreign currency translation— — 185 185 
Measurement period adjustments— — (3,829)(3,829)
Impairment losses— — — — 
Balance at September 30, 2025$7,541 $1,449 $16,705 $25,695 
Schedule of Finite-Lived Intangible Assets
Other intangible assets, net consisted of the following:
September 30, 2025
Weighted Average Amortization PeriodGross Carrying AmountAccumulated AmortizationNet Book Value
(In thousands)
Patents:
Intellectual property operations5 years$366,402 $(347,429)$18,973 
Industrial operations7 years3,400 (1,933)1,467 
Total patents369,802 (349,362)20,440 
Customer relationships:
Industrial operations7 years5,300 (3,014)2,286 
Manufacturing operations15 years22,387 (1,384)21,003 
Total customer relationships27,687 (4,398)23,289 
Trade name and trademarks:
Industrial operations7 years3,430 (1,950)1,480 
Manufacturing operations10 years398 (38)360 
Manufacturing operationsIndefinite8,695 — 8,695 
Total trade name and trademarks12,523 (1,988)10,535 
Developed technology - manufacturing operations10 years1,000 (95)905 
Favorable leases - manufacturing operations1.9 years703 (414)289 
Total$411,715 $(356,257)$55,458 
December 31, 2024
Weighted Average Amortization PeriodGross Carrying AmountAccumulated AmortizationNet Book Value
(In thousands)
Patents:
Intellectual property operations6 years$351,403 $(332,211)$19,192 
Industrial operations7 years3,400 (1,568)1,832 
Total patents354,803 (333,779)21,024 
Customer relationships:
Industrial operations7 years5,300 (2,446)2,854 
Manufacturing operations15 years20,200 (269)19,931 
Total customer relationships25,500 (2,715)22,785 
Trade name and trademarks:
Industrial operations7 years3,430 (1,583)1,847 
Manufacturing operations10 years400 (8)392 
Manufacturing operationsIndefinite8,009 — 8,009 
Total trade name and trademarks11,839 (1,591)10,248 
Developed technology - manufacturing operations10 years1,000 (20)980 
Favorable leases - manufacturing operations1.9 years704 (312)392 
Total$393,846 $(338,417)$55,429 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The following table presents the scheduled annual aggregate amortization expense (in thousands):
Years Ending December 31,
Remainder of 2025$6,160 
202610,937 
20278,478 
20284,211 
20291,628 
20301,628 
Thereafter13,721 
Total$46,763