Other Long-Term Assets and Other Long-Term Liabilities (Summary of Components of Other Long-Term Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Assets Noncurrent [Line Items]
Insurance reserves for professional and general liability, long-term receivable	$ 23,310	$ 34,535
Assets of deferred compensation plan	15,829	14,980
Insurance reserves for workers' compensation liability, long-term receivable	11,642	12,118
Other miscellaneous long-term assets	15,173	12,673
Total other long-term assets	65,954	74,306
Insurance Reserves Indemnified By CHS [Member]
Other Assets Noncurrent [Line Items]
Insurance reserves for professional and general liability, long-term receivable	23,310	34,535
Insurance reserves for workers' compensation liability, long-term receivable	$ 11,642	$ 12,118