Other Long-Term Liabilities (Summary of Components of Other Long-Term Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities Noncurrent [Line Items]
Insurance reserves for professional and general liability, long-term liability	$ 76,062	$ 74,194
Insurance reserve for workers' compensation liability, long-term liability	19,862	17,416
Benefit plan liabilities	34,737	10,722
Deferred rent	3,586	4,001
Other miscellaneous long-term liabilities	2,669	2,663
Total other long-term liabilities	136,916	108,996
Professional and General Liability Insurance [Member]
Other Liabilities Noncurrent [Line Items]
Insurance reserves for professional and general liability, long-term liability	$ 76,062	$ 74,194