Goodwill (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in the carrying value of goodwill

Changes in the carrying amount of goodwill for the ECT reporting unit are as follows (in thousands):

Balance at December 31, 2016:
Goodwill	$	37,180
Accumulated impairment losses	—
Goodwill balance, net	37,180
Activity during the year 2017:
Goodwill impairment recognized	—
Acquisition goodwill recognized	—
Balance at December 31, 2017:
Goodwill	37,180
Accumulated impairment losses	—
Goodwill balance, net	37,180
Activity during the year 2018:
Goodwill impairment recognized	(37,180		)
Acquisition goodwill recognized	—
Balance at December 31, 2018:
Goodwill	37,180
Accumulated impairment losses	(37,180		)
Goodwill balance, net	$	—