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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill The following table shows changes in the carrying amount of Power Solutions goodwill.
Balance as of December 31, 2018$94,505 
Currency impact and other274 
Balance as of December 31, 201994,779 
Currency impact and other(1,837)
Impairments(92,942)
Balance as of December 31, 2020$— 
The following table presents the gross carrying amount of goodwill and accumulated impairment charges as of December 31, 2020, and 2019.
 December 31, 2020December 31, 2019
 Gross Carrying AmountAccumulated Impairment ChargesNet Book ValueGross Carrying AmountAccumulated Impairment ChargesNet Book Value
Mobile Solutions78,254 (78,254)— 77,458 (77,458)— 
Power Solutions213,791 (213,791)— 215,628 (120,849)94,779 
Total goodwill$292,045 $(292,045)$— $293,086 $(198,307)$94,779