OTHER ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
OTHER ASSETS
Straight-line rent receivables, net	$ 107,323	$ 96,883
Marketable debt securities, Carrying Value	43,175	43,331
Unsecured loans receivable, net	61,098	63,598
Goodwill and other intangibles, net	522,410	462,655
Assets held for sale	155,238	119,290
Other	97,799	105,475
Total other assets	$ 987,043	$ 891,232

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

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+ Details

- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.

+ References+ Details