Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (13,867)	$ (3,265)
Other Comprehensive Loss Before Reclassifications	(14,843)	(15,951)
Amounts Reclassified from Accumulated Other Comprehensive Loss	19,043	5,349
Net Current Period Other Comprehensive Income (Loss)	4,200	(10,602)
Balance	(9,667)	(13,867)
Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(14,402)	(3,481)
Other Comprehensive Loss Before Reclassifications	(14,684)	(16,270)
Amounts Reclassified from Accumulated Other Comprehensive Loss	19,043	5,349
Net Current Period Other Comprehensive Income (Loss)	4,359	(10,921)
Balance	(10,043)	(14,402)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(15)	78
Other Comprehensive Loss Before Reclassifications	15	(93)
Amounts Reclassified from Accumulated Other Comprehensive Loss	0	0
Net Current Period Other Comprehensive Income (Loss)	15	(93)
Balance	0	(15)
Comprehensive Income (Loss) Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	550	138
Other Comprehensive Loss Before Reclassifications	(174)	412
Amounts Reclassified from Accumulated Other Comprehensive Loss	0	0
Net Current Period Other Comprehensive Income (Loss)	(174)	412
Balance	376	550
First Industrial L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(14,376)	(3,362)
Other Comprehensive Loss Before Reclassifications	(14,710)	(16,363)
Amounts Reclassified from Accumulated Other Comprehensive Loss	19,043	5,349
Net Current Period Other Comprehensive Income (Loss)	4,333	(11,014)
Balance	(10,043)	(14,376)
First Industrial L.P. | Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(14,402)	(3,481)
Other Comprehensive Loss Before Reclassifications	(14,684)	(16,270)
Amounts Reclassified from Accumulated Other Comprehensive Loss	19,043	5,349
Net Current Period Other Comprehensive Income (Loss)	4,359	(10,921)
Balance	(10,043)	(14,402)
First Industrial L.P. | Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	26	119
Other Comprehensive Loss Before Reclassifications	(26)	(93)
Amounts Reclassified from Accumulated Other Comprehensive Loss	0	0
Net Current Period Other Comprehensive Income (Loss)	(26)	(93)
Balance	$ 0	$ 26