Investments in Unconsolidated Entities (Details 2) (USD $)	11 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Jan. 31, 2013
Schedule of Equity Method Investments [Line Items]
Net gain on disposition of full or partial interest in rental properties	$ 68,311,000	$ 36,356,000	$ 131,027,000
Company's portion of gain on disposition of full or partial interest in rental properties	34,281,000	17,677,000	34,959,000
Net gain (loss) on disposition of full or partial interest in equity method investments	34,149,000	34,744,000	16,107,000
Golden Gate [Member]
Schedule of Equity Method Investments [Line Items]
Net gain on disposition of full or partial interest in rental properties	0	33,881,000	0
Liberty Center [Member]
Schedule of Equity Method Investments [Line Items]
Net gain on disposition of full or partial interest in rental properties	2,829,000	2,475,000	0
Westin Convention Center [Member]
Schedule of Equity Method Investments [Line Items]
Net gain on disposition of full or partial interest in rental properties	65,482,000	0	0
8 Spruce Street [Member]
Schedule of Equity Method Investments [Line Items]
Net gain on disposition of full or partial interest in rental properties	0	0	131,027,000
Westwood Reserve [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	8,904,000	0
Legacy Crossroads [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	6,216,000	0
Colonial Grand [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	4,904,000	0
Legacy Arboretum [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	3,257,000	0
Woodgate/Evergreen Farms [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	2,346,000	0
Barrington Place [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	1,515,000	0
Mall at Stonecrest [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	7,952,000	0
Charleston Town Center [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	27,080,000	0	0
Marketplace at Riverpark [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	8,579,000	0	0
Plaza at Robinson Town Center [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	(1,510,000)	0	0
Village at Gulfstream Park [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	0	14,479,000
Chagrin Plaza I & II [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	0	0	1,628,000
Other [Member]
Schedule of Equity Method Investments [Line Items]
Net gain (loss) on disposition of full or partial interest in equity method investments	$ 0	$ (350,000)	$ 0