Fair Value Measurements - Narrative (Details) $ in Thousands				1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 01, 2025 USD ($) payment	Dec. 02, 2024 USD ($)	Sep. 03, 2024 USD ($) payment	Feb. 28, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) payment	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Nov. 30, 2023 USD ($)	Jul. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest income					$ 88	$ 626	$ 792	$ 1,734
Acquisition-related retention expense and contingent consideration					610	610	1,832	2,344
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on change in fair value of interest rate swap					100	300	200	100
Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of the interest rate swap					100		100		$ 200
ACME Industrial piping LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					2,500		2,500				$ 1,500
Payment to former owners							500
ACME Industrial piping LLC | Earn Out Payment One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					500		$ 500
Number of earnout tranches | payment							2
Earnout period							12 months
ACME Industrial piping LLC | Earn Out Payment One | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies							$ 2,000
ACME Industrial piping LLC | Earn Out Payment Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					2,000		$ 2,000
Earnout period							12 months
ACME Industrial piping LLC | Earn Out Payment Two | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies							$ 2,500
Industrial Air Transaction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					6,500		6,500			$ 3,200
Payment to former owners				$ 3,000
Industrial Air Transaction | Earn Out Payment One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					3,000		$ 3,000
Number of earnout tranches | payment							2
Earnout period							12 months
Industrial Air Transaction | Earn Out Payment One | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies							$ 7,600
Industrial Air Transaction | Earn Out Payment Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability					3,500		$ 3,500
Earnout period							12 months
Industrial Air Transaction | Earn Out Payment Two | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies							$ 8,800
Kent Island Mechanical, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			$ 4,400
Number of earnout tranches | payment			2
Earnout provision			$ 4,381				4,381
Kent Island Mechanical, Inc. | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			5,000
Kent Island Mechanical, Inc. | Earn Out Payment One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			$ 2,500
Earnout period			12 months
Kent Island Mechanical, Inc. | Earn Out Payment One | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies			$ 3,300
Kent Island Mechanical, Inc. | Earn Out Payment Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			$ 2,500
Earnout period			12 months
Kent Island Mechanical, Inc. | Earn Out Payment Two | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies			$ 200
Consolidated Mechanical
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability	$ 2,000
Number of earnout tranches | payment	2
Earnout provision		$ 757					757
Consolidated Mechanical | Earn Out Payment One
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability	$ 1,000
Consolidated Mechanical | Earn Out Payment Two
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability	$ 1,000
Earnout period	12 months
Consolidated Mechanical | Earn Out Payment Two | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross profits from acquired companies	$ 6,800
Jake Marshall Transaction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related retention expense and contingent consideration					300	600	1,500	2,300
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest income					$ 100	$ 600	$ 800	$ 1,700
Level 3 | Kent Island Mechanical, Inc. | Contingent Consideration Liability | Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout payments, measurement input					0.149		0.149
Level 3 | Consolidated Mechanical | Contingent Consideration Liability | Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout payments, measurement input					0.104		0.104
Level 3 | A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, plus interest through February 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt					$ 34,500		$ 34,500