Investments in Unconsolidated Joint Ventures - Financial Results (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets:
Properties, net	$ 9,176,642	$ 6,334,442
Other assets	614,607	507,718
Total assets	9,791,249	6,842,160
Liabilities and partners' capital:
Mortgage and other notes payable	5,224,713	3,607,588
Other liabilities	403,369	355,634
Company's capital	2,279,819	1,585,796
Outside partners' capital	1,883,348	1,293,142
Total liabilities and partners' capital	9,791,249	6,842,160
Investment in unconsolidated joint ventures:
Company's capital	2,279,819	1,585,796
Basis adjustment	(584,887)	(77,701)
Investments in unconsolidated joint ventures	1,694,932	1,508,095
Assets—Investments in unconsolidated joint ventures	1,773,558	1,532,552
Liabilities—Distributions in excess of investments in unconsolidated joint ventures	(78,626)	(24,457)
Investments in unconsolidated joint ventures	1,694,932	1,508,095
Total assets	9,791,249	6,842,160
Amortization of difference between cost of investments and book value of underlying equity	17,610	5,619	$ 5,109
Revenues:
Minimum rents	600,284	315,093	388,363
Percentage rents	20,917	15,757	17,161
Tenant recoveries	235,144	137,467	186,741
Other	56,240	35,113	40,705
Total revenues	912,585	503,430	632,970
Expenses:
Shopping center and operating expenses	274,508	172,647	215,412
Interest expense	187,669	88,727	137,087
Depreciation and amortization	360,378	150,626	144,403
Total operating expenses	822,555	412,000	496,902
Loss on sale of assets	(375)	9,850	3,643
Loss on early extinguishment of debt		(3)
Net (loss) income	89,655	101,277	139,711
Company's equity in net (loss) income	56,941	45,164	60,626
Pacific Premier Retail LP
Revenues:
Minimum rents	129,145	21,172	88,831
Percentage rents	5,437	2,569	2,652
Tenant recoveries	47,856	8,408	40,118
Other	6,303	1,182	4,090
Total revenues	188,741	33,331	135,691
Expenses:
Shopping center and operating expenses	39,804	6,852	37,113
Interest expense	64,626	10,448	34,113
Depreciation and amortization	108,880	16,919	29,688
Total operating expenses	213,310	34,219	100,914
Loss on sale of assets	0	0	(7,044)
Loss on early extinguishment of debt		0
Net (loss) income	(24,569)	(888)	27,733
Company's equity in net (loss) income	(3,088)	1,409	9,743
Other Joint Ventures
Revenues:
Minimum rents	471,139	293,921	299,532
Percentage rents	15,480	13,188	14,509
Tenant recoveries	187,288	129,059	146,623
Other	49,937	33,931	36,615
Total revenues	723,844	470,099	497,279
Expenses:
Shopping center and operating expenses	234,704	165,795	178,299
Interest expense	123,043	78,279	102,974
Depreciation and amortization	251,498	133,707	114,715
Total operating expenses	609,245	377,781	395,988
Loss on sale of assets	(375)	9,850	10,687
Loss on early extinguishment of debt		(3)
Net (loss) income	114,224	102,165	111,978
Company's equity in net (loss) income	60,029	43,755	50,883
Northwestern Mutual Life (NML)
Investment in unconsolidated joint ventures:
Mortgage notes payable to affiliate	265,863	460,872
Interest expense on borrowings from related party	16,898	29,372	$ 38,113
Pacific Premier Retail LLC—Various Properties
Assets:
Total assets	3,179,255	3,283,702
Investment in unconsolidated joint ventures:
Total assets	3,179,255	3,283,702
Total liabilities	$ 1,887,952	$ 1,938,241