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Intangible Assets, Net (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Carrying Amount of Intangible Assets by Segment and by Major Asset Class
The following table shows changes in the carrying amount of intangible assets, net, by reportable segment.
Mobile SolutionsPower SolutionsTotal
Balance as of December 31, 2019$32,416 $84,997 $117,413 
Amortization(3,354)(10,994)(14,348)
Balance as of December 31, 202029,062 74,003 103,065 
Amortization(3,353)(10,994)(14,347)
Balance as of December 31, 2021$25,709 $63,009 $88,718 
The following table shows the cost and accumulated amortization of our intangible assets as of December 31, 2021 and 2020.
  December 31, 2021December 31, 2020
 Estimated 
Useful
Life in Years		Gross
Carrying
Value
as of
Acquisition
Date		Accumulated
Amortization		Net
Carrying
Value		Gross
Carrying
Value
as of
Acquisition
Date		Accumulated
Amortization		Net
Carrying
Value
Customer relationships
12 - 20
$173,746 $(87,895)$85,851 $173,746 $(74,250)$99,496 
Trademark and trade name
8 - 15
7,527 (4,660)2,867 7,527 (3,958)3,569 
Total identified intangible assets$181,273 $(92,555)$88,718 $181,273 $(78,208)$103,065 
Summary of Estimated Amortization Expense
The following table shows estimated future amortization expense for the next five years and thereafter.
Year Ending December 31,
2022$14,347 
202314,262 
202413,919 
202513,919 
202613,919 
Thereafter18,352 
Total$88,718