CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 3,870	$ 3,324
Investments in available for sale securities, restricted (in dollars)	4,104	3,684
Liabilities of discontinued operations, relate to mortgage notes payable (in dollars)	$ 7,510	$ 7,547
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	48,234,022	48,234,022
Common stock, shares outstanding	48,234,022	48,234,022