Intangible Assets and Goodwill Intangible Assets and Goodwill (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets [Abstract]
Accumulated amortization	$ (366,301)	$ (335,761)
Goodwill, net	31,196	7,761
Total intangible assets, net	298,828	326,332
Finite-Lived Intangible Assets, Net	267,632	318,571
Intangible Liabilities [Abstract]
Accumulated amortization	(26,500)	(21,824)
Net intangible liabilities	80,769	83,203
Acquired in-place lease [Member]
Intangible Assets [Abstract]
Intangible Assets	573,711	601,959
Finite-Lived Intangible Assets, Net	234,101
Intangible Liabilities [Abstract]
Intangible Assets	573,711	601,959
Above Market Lease [Member]
Intangible Assets [Abstract]
Intangible Assets	41,276	37,624
Finite-Lived Intangible Assets, Net	(22,638)
Intangible Liabilities [Abstract]
Intangible Assets	41,276	37,624
Below Market Ground Lease [Member]
Intangible Assets [Abstract]
Intangible Assets	10,536	8,825
Finite-Lived Intangible Assets, Net	(6,912)
Intangible Liabilities [Abstract]
Intangible Assets	10,536	8,825
Advance Bookings [Member]
Intangible Assets [Abstract]
Intangible Assets	8,410	5,924
Finite-Lived Intangible Assets, Net	3,981
Intangible Liabilities [Abstract]
Intangible Assets	8,410	5,924
Below Market Ground Lease [Member]
Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Net	75,873
Intangible Liabilities [Abstract]
Intangible Liabilities	101,430	99,187
Above Market Ground Lease [Member]
Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Net	4,896
Intangible Liabilities [Abstract]
Intangible Liabilities	$ 5,839	$ 5,840