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Segment Information (Tables)
9 Months Ended
Sep. 30, 2023
Segment Information  
Summary of revenue and other financial information by reportable segment

    

Contract

    

Aftermarket

    

(in thousands)

    

Operations

    

Services

    

Total

Three months ended September 30, 2023

 

  

 

  

 

  

Revenue

$

207,552

$

45,815

$

253,367

Gross margin

 

132,279

 

9,127

 

141,406

Three months ended September 30, 2022

 

  

 

  

 

  

Revenue

$

170,497

$

43,171

$

213,668

Gross margin

 

98,803

 

7,338

 

106,141

Nine months ended September 30, 2023

 

  

 

  

 

  

Revenue

$

596,417

$

134,327

$

730,744

Gross margin

 

365,629

 

28,388

 

394,017

Nine months ended September 30, 2022

 

  

 

  

 

  

Revenue

$

500,451

$

126,246

$

626,697

Gross margin

 

295,901

 

20,065

 

315,966

Reconciliation of total gross margin to income before taxes

Three Months Ended

    

Nine Months Ended

September 30, 

September 30, 

(in thousands)

    

2023

    

2022

    

2023

    

2022

Total gross margin

$

141,406

$

106,141

$

394,017

$

315,966

Less:

 

  

 

  

 

  

 

  

Selling, general and administrative

 

28,558

 

30,500

 

83,632

 

85,964

Depreciation and amortization

 

42,155

 

39,953

 

123,546

 

124,348

Long-lived and other asset impairment

 

2,922

 

4,154

 

8,383

 

16,217

Restructuring charges

592

1,554

Interest expense

 

28,339

 

25,177

 

83,550

 

74,879

Gain on sale of assets, net

(3,237)

(12,695)

(8,018)

(33,755)

Other expense (income), net

 

(235)

 

(585)

 

1,831

 

(52)

Income before income taxes

$

42,312

$

19,637

$

99,539

$

48,365