Other Deferred Items and Liabilities - Summary of Other Deferred Items and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Continuing operations:
Foreign deferred tax liability	$ 21,336	$ 32,570
Multi-employer pension plan withdrawal liability	15,864	15,693
Self-insured liability	6,662	8,682
Self-insured excess liability	6,358	9,982
Accrued compensation	5,821	7,485
Accrued restructuring	2,751	2,383
Contract liabilities	23	125
Other	1,456	2,423
Total continuing operations	60,271	79,343
Discontinued operations:
Environmental remediation liabilities	2,179	1,964
Self-insured liability	1,639	2,018
Other	539	382
Total discontinued operations	4,357	4,364
Total other deferred items and liabilities	$ 64,628	$ 83,707