Supplemental Cash Flow Information of the Company - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $65,627, $44,757, and $47,675 as of December 31, 2018, 2017 and 2016, respectively	$ 44,697	$ 67,336	$ 54,295
Capitalized interest	65,627	44,757	47,675
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	158,626	116,089	62,589
Tenant improvements funded directly by tenants	13,968	15,314	18,050
Assumption of other assets and liabilities in connection with operating and development property acquisitions, net	40,624	1,443	5,863
Accrual for receivable related to development properties	0	0	1,350
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	47,559	43,448	220,650
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	1,962	10,939	8,893
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	0	0	1,656
Issuance of common units of the Operating Partnership in connection with an acquisition			48,033
Secured debt assumed by buyers in connection with land disposition	$ 0	$ 0	$ 2,322