v3.26.1
Goodwill and Intangible Assets Intangibles (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Jan. 16, 2026
Sep. 30, 2025
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, before Accumulated Amortization $ 141,578   $ 117,168
Intangible Asset, Finite-Lived, Accumulated Amortization (87,341)   (75,523)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization 54,237   41,645
Trademarks and Trade Names [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, before Accumulated Amortization 21,089   16,199
Intangible Asset, Finite-Lived, Accumulated Amortization (10,379)   (8,549)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization $ 10,710   $ 7,650
Trademarks and Trade Names [Member] | Minimum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 5 years   5 years
Trademarks and Trade Names [Member] | Maximum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 20 years   20 years
Technical Library      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 20 years   20 years
Intangible Asset, Finite-Lived, before Accumulated Amortization $ 400   $ 400
Intangible Asset, Finite-Lived, Accumulated Amortization (256)   (241)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization $ 144   $ 159
Noncompete Agreements [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 5 years   5 years
Intangible Asset, Finite-Lived, before Accumulated Amortization $ 940   $ 940
Intangible Asset, Finite-Lived, Accumulated Amortization (172)   (31)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization 768   909
Backlog [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, before Accumulated Amortization 1,257   1,257
Intangible Asset, Finite-Lived, Accumulated Amortization (972)   (678)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization $ 285   $ 579
Backlog [Member] | Minimum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 1 year   1 year
Backlog [Member] | Maximum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 2 years   2 years
Customer Relationships [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, before Accumulated Amortization $ 117,892   $ 98,372
Intangible Asset, Finite-Lived, Accumulated Amortization (75,562)   (66,024)
Intangible Asset, Excluding Goodwill, after Accumulated Amortization $ 42,330   $ 32,348
Customer Relationships [Member] | Gulf Island      
Intangible Asset, Finite-Lived [Line Items]      
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill   $ 19,520  
Customer Relationships [Member] | Minimum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 1 year   1 year
Customer Relationships [Member] | Maximum [Member]      
Intangible Asset, Finite-Lived [Line Items]      
Intangible Asset, Finite-Lived, Useful Life 15 years   15 years