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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Carrying value of goodwill by reporting segment and the activity
The carrying value of goodwill and the activity for the two year period ending December 31, 2019 are as follows (in thousands):
Balance, December 31, 2017
$
909,811

Goodwill from acquisitions
9,228

Currency translation adjustments
(14,468
)
Balance, December 31, 2018
904,571

Goodwill from acquisitions
469,446

Goodwill impairment
(6,543
)
Currency translation adjustments
(2,878
)
Balance, December 31, 2019
$
1,364,596