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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]  
Schedule of Reconciliation of Activity for Goodwill

A reconciliation of the activity for goodwill for the first half of 2019 and the first half of 2018 is as follows:

 

 

 

First Half

 

(in thousands)

 

2019

 

 

2018

 

Beginning balance - goodwill

 

$

165,903

 

 

$

169,316

 

Measurement period adjustments(1)

 

 

-

 

 

 

1,583

 

Ending balance - goodwill

 

$

165,903

 

 

$

170,899

 

(1)

Measurement period adjustments relate to post-closing adjustments made in accordance with the terms and conditions of the applicable asset purchase agreement or asset exchange agreement for distribution territories acquired or exchanged by the Company in April 2017 and October 2017 as part of the System Transformation. All final post-closing adjustments for these transactions were completed during 2018.