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Goodwill (Tables)
9 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table presents changes in goodwill in the accompanying Consolidated Balance Sheet for the year ended December 31, 2018 and period ended September 30, 2019 (in thousands):
 
December 31, 2018
 
September 30, 2019
Goodwill at the beginning of the period
$
287,956

 
$
303,887

Increase in goodwill related to acquisitions
16,777

 

Decrease in goodwill related to divestitures

 
(4,197
)
Decrease in goodwill related to impairments
(846
)
 
(509
)
Goodwill at the end of the period
$
303,887

 
$
299,181