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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2025

Fair value

Schedule of carrying value and estimated fair value of debt instruments

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​	​	​	​	​	​	​
(in thousands)		March 31, 2025			December 31, 2024
Carrying amount of fixed rate debt (1)	​	$	1,790,442	​	$	1,790,051
Fair value of fixed rate debt	​		1,803,000	​		1,796,000

(1) Carrying amounts are shown net of unamortized premium and deferred financing costs. See Note 7 (“Long-Term Debt”).

Compressors

Fair value

Schedule of significant unobservable inputs

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​	​	​	​	​
​		Range		Weighted Average (1)
Estimated net sale proceeds:	​	​	​	​
As of March 31, 2025	​	$0 - $241 per horsepower	​	$47 per horsepower
As of December 31, 2024	​	$0 - $188 per horsepower	​	$46 per horsepower

(1) Calculated based on an estimated discount for market liquidity of 25% as of both March 31, 2025 and December 31, 2024.

Schedule of non-recurring fair value assets

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(in thousands)	​	​	​	March 31, 2025		​	December 31, 2024
Impaired compression fleet	​	​	​	$	119	​	$	1,048

ECOTEC | Equity investment

Fair value

Schedule of significant unobservable inputs

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Significant

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Three Months Ended

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Three Months Ended

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Unobservable

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March 31, 2025

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March 31, 2024

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Inputs

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Range

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Median

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Range

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Median

Valuation technique:

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Discounted cash flow

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WACC

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0.0% - 17.0%

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12.9%

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0.4% - 20.0%

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13.5%

Guideline public company

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Revenue multiple

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1.6x - 7.3x

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7.3x

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1.5x - 7.2x

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3.8x

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- Definition

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Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

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