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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill

2017

2016
Balance, January 1
$
244,000


$
243,129

Goodwill acquired
201,824



Measurement period adjustment
(469
)

$
871

Balance, December 31
$
445,355


$
244,000