Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 22, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019
Income Taxes [Line Items]
Nondeductible expenses, Percent	7.50%		1.10%	1.10%
Federal statutory tax, Percent	21.00%		35.00%	35.00%
Revaluation of deferred tax assets and liabilities		$ 8,000
Deferred income taxes asset	$ 69,688		$ 23,210
Accumulated undistributed earnings	42,000
Unrecognized tax benefits	22,400		3,200
Unrecognized tax benefits that would impact effective tax rate	11,000		3,100
Decrease in unrecognized tax benefits is reasonably possible	6,400
Unrecognized tax benefits, interest and penalty income	1,100
Unrecognized tax benefits, interest expense			200	$ 100
Unrecognized tax benefits, accrued interest and penalty income	$ 8,300		$ 400
Scenario Forecast [Member]
Income Taxes [Line Items]
Unrecognized tax benefits that would impact effective tax rate					$ 2,300
Layne Acquisition [Member]
Income Taxes [Line Items]
Federal and state capital loss carryforwards expiration date	Dec. 31, 2018
Unrecognized tax benefits, increase in accrued interest and penalties due to acquisition	$ 9,000
Other Noncurrent Assets [Member]
Income Taxes [Line Items]
Deferred income taxes asset	$ 2,900