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Goodwill (Tables)
 9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
 
 

2017
Balance, January 1
$
244,000

Goodwill acquired
201,824

Measurement period adjustment
(469
)
Balance, December 31
$
445,355