Revenue from Contract with Customers (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands)	2021		2020		2021		2020
Contract operations:
0 ― 1,000 horsepower per unit	$	41,576	$	51,409	$	134,413	$	175,877
1,001 ― 1,500 horsepower per unit		66,138		73,205		201,454		236,083
Over 1,500 horsepower per unit		51,018		50,142		152,360		156,351
Other ⁽¹⁾		179		467		583		1,835
Total contract operations revenue ⁽²⁾		158,911		175,223		488,810		570,146

Aftermarket services:
Services		19,249		17,961		53,149		62,492
OTC parts and components sales		17,006		12,447		44,253		43,006
Total aftermarket services revenue ⁽³⁾		36,255		30,408		97,402		105,498

Total revenue	$	195,166	$	205,631	$	586,212	$	675,644

(1)	Primarily relates to fees associated with owned non-compression equipment.

(2)

Includes $0.7 million and $1.4 million for the three months ended September 30, 2021 and 2020, respectively, and $3.1 million and $4.5 million for the nine months ended September 30, 2021 and 2020, respectively, related to billable maintenance on owned compressors that was recognized at a point in time. All other contract operations revenue is recognized over time.

(3)	All services revenue within aftermarket services is recognized over time. All OTC parts and components sales revenue is recognized at a point in time.

Schedule of remaining Performance Obligation


(in thousands)	2021		2022		2023		2024		2025			2026	Total
Remaining performance obligations	$	1,093	$	95,890	$	128,521	$	32,787	$	9,148	$	759	$	268,198

Summary of changes in the allowance for credit losses balance


(in thousands)
Balance at December 31, 2020	$	3,370
Provision for credit losses		151
Write-offs charged against allowance		(464)
Balance at September 30, 2021	$	3,057