Financial Information by Segment - Schedule of Income from Operations before Income Taxes and Finance Costs, Corporate and Other (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Restructuring expenses	$ 0	$ 2,710	$ 0	$ 3,833
Long Term Incentive Plan	1,182	2,025	1,242	7,137
Corporate
Segment Reporting Information [Line Items]
Restructuring expenses	0	2,710	0	3,833
Consulting fees related to Company strategy	0	(674)	0	831
Extraordinary expense items related to COVID-19	822	0	3,548	0
Long Term Incentive Plan	1,182	2,025	1,242	7,137
EPA-related expenses	1,487	1,549	5,053	2,957
Other non-operating	3,222	1,933	5,283	2,922
Expense from operations before income taxes and finance costs	$ 6,714	$ 7,543	$ 15,125	$ 17,680