Employee Benefit Plans - Workers' Compensation (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Current liabilities	$ 10,582	$ 10,355
Current liabilities - discontinued operations	2,730	4,847
Long-term liabilities	103,574	113,904
Long-term liabilities - discontinued operations	21,119	26,000
Total liabilities	138,005	155,106
Less expected insurance receivable	(47,644)	(50,688)
Less long-term expected insurance receivable - discontinued operations	(6,020)	(6,970)
Workers’ compensation obligations, net of expected insurance receivables	$ 84,341	$ 97,448