Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Changes in Goodwill by Operating Segment (Details)

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Goodwill and Intangible Assets - Changes in Goodwill by Operating Segment (Details) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Goodwill [Roll Forward]      
Beginning balance   $ 238,126,000 $ 276,450,000
Impairment charge   0 (30,945,000)
Decrease from divestiture     (7,379,000)
Increase from acquisitions   10,627,000  
Ending balance   248,753,000 238,126,000
Fleet      
Goodwill [Roll Forward]      
Beginning balance   63,190,000 63,190,000
Impairment charge     0
Decrease from divestiture     0
Increase from acquisitions   0  
Ending balance   63,190,000 63,190,000
Federal and Defense      
Goodwill [Roll Forward]      
Beginning balance   30,883,000 30,883,000
Impairment charge     0
Decrease from divestiture     0
Increase from acquisitions   608,000  
Ending balance   31,491,000 30,883,000
Aviation      
Goodwill [Roll Forward]      
Beginning balance   144,053,000 182,377,000
Impairment charge $ (30,900,000)   (30,945,000)
Decrease from divestiture     (7,379,000)
Increase from acquisitions   10,019,000  
Ending balance   $ 154,072,000 $ 144,053,000