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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
The following table shows the gross carrying amount of goodwill and accumulated impairment charges as of December 31, 2018 and 2017.
 
 
December 31, 2018
 
December 31, 2017
 
 
Gross Carrying Amount
 
Accumulated Impairment Charges
 
Net Book Value
 
Gross Carrying Amount
 
Accumulated Impairment Charges
 
Net Book Value
Mobile Solutions
 
$
74,147

 
$
(74,147
)
 
$
—

 
$
74,147

 
$
—

 
$
74,147

Power Solutions
 
205,405

 
(110,900
)
 
94,505

 
204,481

 
(1,800
)
 
202,681

Life Sciences
 
344,947

 
—

 
344,947

 
177,784

 
—

 
177,784

Total goodwill
 
$
624,499

 
$
(185,047
)
 
$
439,452

 
$
456,412

 
$
(1,800
)
 
$
454,612

The following table shows changes in the carrying amount of goodwill for the years ended December 31, 2018, and 2017.
 
 
Mobile Solutions
 
Power Solutions
 
Life Sciences
 
Total
Balance as of December 31, 2016
 
$
73,263

 
$
201,934

 
$
168,332

 
$
443,529

Currency impact
 
884

 
747

 
—

 
1,631

Goodwill acquired in acquisitions
 
—

 
—

 
9,452

 
9,452

Balance as of December 31, 2017
 
74,147

 
202,681

 
177,784

 
454,612

Currency impact and other
 
(705
)
 
(1,882
)
 
(3,118
)
 
(5,705
)
Goodwill acquired in acquisitions
 
—

 
2,657

 
165,288

 
167,945

Impairments
 
(73,442
)
 
(109,100
)
 
—

 
(182,542
)
Measurement period adjustments
 
—

 
149

 
4,993

 
5,142

Balance as of December 31, 2018
 
$
—

 
$
94,505

 
$
344,947

 
$
439,452