CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 4,281	$ 2,792
Investments in available for sale securities, restricted (in dollars)	4,690	3,684
Liabilities of discontinued operations, related to mortgage notes payable (in dollars)	$ 0	$ 7,547
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued	48,613,442	48,234,022
Common stock, shares outstanding	48,613,442	48,234,022