Supplemental Cash Flow Information of the Company (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
SUPPLEMENTAL CASH FLOWS INFORMATION:
Interest paid, net	$ 54,295	$ 54,747	$ 58,944
Capitalized interest	44,675	50,923	44,385
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	62,589	109,715	77,091
Tenant improvements funded directly by tenants	18,050	13,387	42,906
Assumption of other assets and liabilities in connection with operating and development property acquisitions, net	5,863	6,254	14,917
Accrual for receivable related to development property	1,350	0	0
Release of holdback funds to third party	0	9,279	0
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	220,650	33,336	31,243
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	1,656	1,656	1,656
Issuance of shares/ units of common stock in connection with an acquisition and development property acquisition	48,033	0	21,631
Secured debt assumed by buyers in connection with land disposition	2,322	0	0
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$ 8,893	$ 1,223	$ 28