Discontinued Operations - Textual (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from disposal of discontinued operations net of tax		$ 0	$ 0	$ 17,367
Environmental services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses, increase (decrease) sales price	$ (22,000)
Loss from disposal of discontinued operations before income taxes				22,000
Loss from disposal of discontinued operations net of tax				$ 17,400