Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Supplemental disclosures:
Cash paid for interest			$ 203,438	$ 204,366
Cash paid for income taxes			4,474	5,346
Non-cash investing and financing activities:
Accrued capital expenditures, tenant improvements and real estate developments			13,670	5,762
Accrued deferred financing costs			0	169
Real estate contributions to Industrial Partnership			29,577	0
Distributions declared and unpaid			150,970	145,673
Distributions payable relinquished		$ 6,429	7,799	0
Surrender of Limited Partner OP Units	$ 191,974	$ 26,537	191,974	0
Mortgage note payable relieved by foreclosure or a deed-in-lieu of foreclosure			19,525	16,200
Exchange of real estate investments			$ 8,900	$ 1,386