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Note 2 - Summary of Significant Accounting Policies (Details Textual)
9 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Percent of Revenues Derived from Medicare, Medicaid and Other Government Programs [Member]      
Concentration Risk, Percentage 65.00%    
Medicare and Medicaid [Member]      
Allowance for Doubtful Accounts Receivable $ 26,411,000   $ 22,931,000
Minimum [Member] | Building and Building Improvements [Member]      
Property, Plant and Equipment, Useful Life 20 years    
Minimum [Member] | Equipment and Furniture [Member]      
Property, Plant and Equipment, Useful Life 3 years    
Minimum [Member]      
Management Services Fees 6.00%    
Maximum [Member] | Building and Building Improvements [Member]      
Property, Plant and Equipment, Useful Life 40 years    
Maximum [Member] | Equipment and Furniture [Member]      
Property, Plant and Equipment, Useful Life 15 years    
Maximum [Member]      
Management Services Fees 7.00%    
Corporate Office Costs [Member]      
General and Administrative Expense $ 23,356,000 $ 24,234,000  
Refundable Advance Fees [Member]      
Nonrefundable Resident Entry Fee Percentage 10.00%    
Customer Refundable Fees $ 10,208,000   10,219,000
Original Entry Fee [Member]      
Refundable Resident Entry Fee Percentage 90.00%    
Appreciation [Member]      
Appreciation of Apartment Over Original Residents Entry Fee Percentage 40.00%    
Continuing Care Retirement Communities Advance Fees, Obligation for Future Services, Amount $ 3,927,000   $ 3,927,000
Malpractice Loss Contingency, Number of Claims 33