Property, net - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 28, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation expenses		$ 90,540	$ 68,663	$ 271,861	$ 205,158
Impairment loss		4,318	238	10,234	8,754
Gain loss on sale of properties		1,080	8,872	2,402	7,187
Development cost		104	302		1,102
Gain on sale or write down of assets, net		$ 3,573	(738)	3,996	(7,110)
Land sales			$ 927	$ 1,056	$ 1,165
Wilshire Boulevard
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net	$ 9,033
Ownership interest sold (as a percent)	30.00%