Receivables (Schedule of Other Receivables and Advances) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	$ 79,164	$ 72,478
Less: allowance for doubtful accounts	(14,235)	(10,326)
Accounts receivable, net	64,929	62,152
Other receivables and advances	375	1,193
Medicare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	20,007	20,402
Medicaid and other non-federal government programs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	29,453	31,208
Other patient and resident receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	$ 29,704	$ 20,868