Receivables (Schedule of Other Receivables and Advances) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	$ 32,969	$ 28,598
Other receivables	1,397	1,739
Medicare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	10,506	11,000
Medicaid and other non-federal government programs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	12,648	10,499
Other patient and resident receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables before the allowance for doubtful accounts	$ 9,815	$ 7,099