Other Investments and Assets - Summary of Other Investments and Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Investments All Other Investments [Abstract]
Cash surrender value of life insurance	$ 24,951	$ 24,873
Self-insured liability receivable	9,982	9,982
Contract costs	4,760	3,961
Other mutual funds	2,633	3,107
Other	3,218	3,196
Other investments and assets	$ 45,544	$ 45,119