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Segments (Tables)
9 Months Ended
Sep. 30, 2021
Segment Reporting [Abstract]  
Summary of revenue and other financial information by reportable segment

    

Contract

    

Aftermarket

    

(in thousands)

    

Operations

    

Services

    

Total

Three months ended September 30, 2021

 

  

 

  

 

  

Revenue

$

158,911

$

36,255

$

195,166

Gross margin

 

97,631

 

5,603

 

103,234

Three months ended September 30, 2020

 

  

 

  

 

  

Revenue

$

175,223

$

30,408

$

205,631

Gross margin

 

114,779

 

4,699

 

119,478

Nine months ended September 30, 2021

 

  

 

  

 

  

Revenue

$

488,810

$

97,402

$

586,212

Gross margin

 

304,778

 

13,477

 

318,255

Nine months ended September 30, 2020

 

  

 

  

 

  

Revenue

$

570,146

$

105,498

$

675,644

Gross margin

 

367,661

 

16,112

 

383,773

Reconciliation of net income (loss) to gross margin

Three Months Ended

    

Nine Months Ended

September 30, 

September 30, 

(in thousands)

    

2021

    

2020

    

2021

    

2020

Total gross margin

$

103,234

$

119,478

$

318,255

$

383,773

Less:

 

  

 

  

 

  

 

  

Selling, general and administrative

 

28,839

 

18,681

 

80,000

 

78,052

Depreciation and amortization

 

45,280

 

47,279

 

135,185

 

145,950

Long-lived and other asset impairment

 

5,121

 

10,727

 

15,154

 

72,132

Goodwill impairment

99,830

Restructuring charges

313

2,900

1,953

7,036

Interest expense

 

25,508

 

25,221

 

82,711

 

80,664

Debt extinguishment loss

 

 

 

 

3,971

Gain on sale of assets, net

(15,393)

(9,146)

(29,549)

(11,073)

Other (income) expense, net

 

337

 

(324)

 

(1,634)

 

(1,317)

Income (loss) before income taxes

$

13,229

$

24,140

$

34,435

$

(91,472)