Restructuring charges (Tables)

6 Months Ended

Jun. 30, 2019

Restructuring And Related Activities [Abstract]

Schedule of Restructuring Charges

Restructuring charges recognized for the above actions for the three and six months ended June 30, 2018 are summarized as follows:

	Three Months Ended			Six Months Ended
	June 30, 2018			June 30, 2018
Costs of contract revenues—depreciation	$	1,676		$	4,668
Costs of contract revenues—other		(274	)		993
General and administrative expenses		(28	)		(21	)
Loss on sale of assets—net		(840	)		(847	)
Other expense		—			2,015
Total	$	534		$	6,808