Goodwill (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill from December 31, 2019 to June 30, 2020 were as follows:  

	(Thousands of Dollars)
Goodwill as of December 31, 2019	137,458
Disposition of Well Support Services reporting unit	(660)
Impairment expense	(32,600)
Goodwill as of June 30, 2020	$	104,198