Investments in Unconsolidated Joint Ventures - Combined Condensed Statements of Operations of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Minimum rents	$ 75,853	$ 102,159	$ 214,678	$ 298,055
Percentage rents	3,561	4,451	7,991	10,496
Tenant recoveries	32,260	49,487	95,963	145,360
Other	8,688	11,163	23,121	31,767
Total revenues	120,362	167,260	341,753	485,678
Expenses:
Shopping center and operating expenses	43,350	57,037	123,009	162,668
Interest expense	19,025	35,401	58,805	109,879
Depreciation and amortization	34,653	37,367	97,422	107,035
Total operating expenses	97,028	129,805	279,236	379,582
Gain on sale or write down of assets, net	3,573	(738)	3,996	(7,110)
Loss on early extinguishment of debt	(3)		(3)
Net income	26,904	36,717	66,510	98,986
Company's equity in net income	10,817	16,935	28,185	44,607
Pacific Premier Retail LLC
Revenues:
Minimum rents	0	25,095	0	76,829
Percentage rents	0	653	0	1,862
Tenant recoveries	0	11,495	0	34,614
Other	0	962	0	3,652
Total revenues	0	38,205	0	116,957
Expenses:
Shopping center and operating expenses	0	9,959	0	31,772
Interest expense	0	9,643	0	29,572
Depreciation and amortization	0	8,199	0	25,747
Total operating expenses	0	27,801	0	87,091
Gain on sale or write down of assets, net	0	(732)	0	(7,044)
Loss on early extinguishment of debt	0		0
Net income	0	9,672	0	22,822
Company's equity in net income	0	4,379	0	9,865
Tysons Corner LLC
Revenues:
Minimum rents	17,667	15,542	51,824	47,516
Percentage rents	7	115	426	719
Tenant recoveries	12,305	11,757	36,776	35,140
Other	869	678	2,260	2,294
Total revenues	30,848	28,092	91,286	85,669
Expenses:
Shopping center and operating expenses	10,010	9,694	29,527	29,374
Interest expense	8,466	8,107	24,968	23,590
Depreciation and amortization	5,600	5,162	16,626	14,520
Total operating expenses	24,076	22,963	71,121	67,484
Gain on sale or write down of assets, net	0	0	0	0
Loss on early extinguishment of debt	0		0
Net income	6,772	5,129	20,165	18,185
Company's equity in net income	452	988	5,286	4,357
Other Joint Ventures
Revenues:
Minimum rents	58,186	61,522	162,854	173,710
Percentage rents	3,554	3,683	7,565	7,915
Tenant recoveries	19,955	26,235	59,187	75,606
Other	7,819	9,523	20,861	25,821
Total revenues	89,514	100,963	250,467	283,052
Expenses:
Shopping center and operating expenses	33,340	37,384	93,482	101,522
Interest expense	10,559	17,651	33,837	56,717
Depreciation and amortization	29,053	24,006	80,796	66,768
Total operating expenses	72,952	79,041	208,115	225,007
Gain on sale or write down of assets, net	3,573	(6)	3,996	(66)
Loss on early extinguishment of debt	(3)		(3)
Net income	20,132	21,916	46,345	57,979
Company's equity in net income	$ 10,365	$ 11,568	$ 22,899	$ 30,385