Condensed Consolidated Balance Sheets [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets held for sale, net (in dollars)	$ 0	$ 1,952,264
Acquired lease assets, accumulated amortization (in dollars)	556	42
Deferred costs, accumulated amortization (in dollars)	6	2,033
Below market lease liabilities, accumulated amortization (in dollars)	121	4
Liabilities related to assets held-for-sale (includes consolidated VIEs of $0 and $2,374,516, respectively) (in dollars)	0	2,380,162
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	96,000,000	96,000,000
Common Stock, shares issued	59,372,672
Common Stock, shares outstanding	59,372,672
Series A cumulative redeemable preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Series A cumulative redeemable preferred stock, liquidation preference (in dollars)	88,146	88,146
Series A cumulative redeemable preferred stock, shares authorized	4,600,000	4,600,000
Series A cumulative redeemable preferred stock, shares issued	3,525,822	3,525,822
Series A cumulative redeemable preferred stock, shares outstanding	3,525,822	3,525,822
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares issued	55,372,672	56,731,002
Common Stock, shares outstanding	55,372,672	56,731,002
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	2,000,000	2,000,000
Common Stock, shares issued	2,000,000	2,000,000
Common Stock, shares outstanding	2,000,000	2,000,000
Common Class B Two [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	2,000,000	2,000,000
Common Stock, shares issued	2,000,000	2,000,000
Common Stock, shares outstanding	2,000,000	2,000,000
Variable Interest Entity, Primary Beneficiary [Member]
Assets held for sale, net (in dollars)	0	1,913,353
Liabilities related to assets held-for-sale (includes consolidated VIEs of $0 and $2,374,516, respectively) (in dollars)	$ 0	$ 2,374,516