Other Contingencies (Details) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended
	Jul. 31, 2011	Dec. 31, 2012 financial_covenant	Dec. 31, 2012 Standby Letter Of Credit [Member]	Jan. 02, 2013 Subsequent Event [Member] Standby Letter Of Credit [Member]	Jan. 31, 2013 Maximum [Member] Subsequent Event [Member]
Short-term Debt [Line Items]
Bank line of credit		$ 57,000,000
Borrowings under line of credit		0
Irrevocable standby letter of credit, outstanding			40,420,000	43,520,000
Reduction of bank line of credit		$ (40,420,000)
Number of financial covenants		2
Line of credit expiration date		Jun. 30, 2013
Number of states in which entity operates		48
Percentage of reduction to Medicare payments to nursing centers	11.10%
Percentage of reduction of Medicare payments to plans and providers					2.00%