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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2025

Fair value

Schedule of carrying value and estimated fair value of debt instruments

​

​	​	​	​	​	​	​
(in thousands)		September 30, 2025			December 31, 2024
Carrying amount of fixed rate debt (1)	​	$	1,791,219	​	$	1,790,051
Fair value of fixed rate debt	​		1,820,000	​		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 non-recurring fair value assets

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​	​	​	​	​	​	​	​	​
(in thousands)	​	​	​	September 30, 2025		​	December 31, 2024
Impaired compression fleet	​	​	​	$	622	​	$	1,048

Schedule of significant unobservable inputs

​

​	​	​	​	​
​		Range		Weighted Average (1)
Estimated net sale proceeds:	​	​	​	​
As of September 30, 2025	​	$1 - $241 per horsepower	​	$53 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 22% and 25% as of September 30, 2025 and December 31, 2024, respectively.

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- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

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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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