Other Deferred Items and Liabilities - Summary of Other Deferred Items and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Continuing operations:
Self-insured liability	$ 12,918	$ 12,981
Self-insured excess liability	10,442	10,463
Accrued compensation	9,740	8,514
Foreign deferred tax liability	8,267	2,264
Deferred rent	3,855	5,271
Accrued restructuring	1,827	1,858
Other	1,305	1,300
Total continuing operations	48,354	42,651
Discontinued operations:
Self-insured liability	2,557	3,748
Environmental remediation liabilities	1,728	3,091
Accrued income taxes		1,045
Other	219	199
Total discontinued operations	4,504	8,083
Total other deferred items and liabilities	$ 52,858	$ 50,734