CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Lease Revenue	$ 473,236	$ 437,543	$ 422,236
Other Revenue	3,054	10,485	3,748
Total Revenues	476,290	448,028	425,984
Expenses:
Property Expenses	131,300	119,195	116,585
General and Administrative	34,610	32,848	28,569
Depreciation and Other Amortization	130,953	129,638	121,229
Total Expenses	296,863	281,681	266,383
Other Income (Expense):
Gain on Sale of Real Estate	150,310	86,751	124,942
Interest Expense	(44,103)	(51,293)	(50,273)
Amortization of Debt Issuance Costs	(3,423)	(3,428)	(3,218)
Total Other Income (Expense)	102,784	32,030	71,451
Income from Operations Before Equity in (Loss) Income of Joint Ventures and Income Tax Provision	282,211	198,377	231,052
Equity in (Loss) Income of Joint Ventures	(161)	4,200	16,235
Income Tax Provision	(4,879)	(2,408)	(3,406)
Net Income	277,171	200,169	243,881
Less: Net Income Attributable to the Noncontrolling Interests	(6,174)	(4,180)	(5,106)
Net Income Available to Common Stockholders / Unitholders and Participating Securities	$ 270,997	$ 195,989	$ 238,775
Basic Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.09	$ 1.53	$ 1.89
Diluted Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.09	$ 1.53	$ 1.88
Weighted Average Shares/Units Outstanding - Basic	129,688	127,711	126,392
Weighted Average Shares / Units Outstanding - Diluted	129,775	127,904	126,691
First Industrial, L.P.
Revenues
Lease Revenue	$ 473,236	$ 437,543	$ 422,236
Other Revenue	3,054	10,485	3,748
Total Revenues	476,290	448,028	425,984
Expenses:
Property Expenses	131,300	119,195	116,585
General and Administrative	34,610	32,848	28,569
Depreciation and Other Amortization	130,953	129,638	121,229
Total Expenses	296,863	281,681	266,383
Other Income (Expense):
Gain on Sale of Real Estate	150,310	86,751	124,942
Interest Expense	(44,103)	(51,293)	(50,273)
Amortization of Debt Issuance Costs	(3,423)	(3,428)	(3,218)
Total Other Income (Expense)	102,784	32,030	71,451
Income from Operations Before Equity in (Loss) Income of Joint Ventures and Income Tax Provision	282,211	198,377	231,052
Equity in (Loss) Income of Joint Ventures	(161)	4,200	16,235
Income Tax Provision	(4,879)	(2,408)	(3,406)
Net Income	277,171	200,169	243,881
Less: Net Income Attributable to the Noncontrolling Interests	(133)	(235)	(253)
Net Income Available to Common Stockholders / Unitholders and Participating Securities	$ 277,038	$ 199,934	$ 243,628
Basic Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.10	$ 1.54	$ 1.89
Diluted Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.09	$ 1.53	$ 1.88
Weighted Average Shares/Units Outstanding - Basic	131,740	129,752	128,831
Weighted Average Shares / Units Outstanding - Diluted	132,237	130,127	129,241