Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (4,643)
Other Comprehensive Income Before Reclassifications	(1,864)
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,730
Net Current Period Other Comprehensive Income	866
Balance	(3,777)
Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,804)
Other Comprehensive Income Before Reclassifications	(1,831)
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,730
Net Current Period Other Comprehensive Income	899
Balance	(3,905)
Comprehensive Loss Attributable to Noncontrolling Interest of the Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	161
Other Comprehensive Income Before Reclassifications	(33)
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income	(33)
Balance	128
First Industrial, L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,804)
Balance	(3,905)
First Industrial, L.P. | Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,804)
Other Comprehensive Income Before Reclassifications	(1,831)
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,730
Net Current Period Other Comprehensive Income	899
Balance	$ (3,905)