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Accumulated Other Comprehensive Income (Changes in AOCI) (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 USD ($)
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | $ 1,475,877
Net Current Period Other Comprehensive Income | 9,297
Ending Balance | 1,655,812
Interest Rate Protection Agreements |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | 1,382
Other Comprehensive Income Before Reclassifications | 8,690
Amounts Reclassified from Accumulated Other Comprehensive Income | 607
Net Current Period Other Comprehensive Income | 9,297
Ending Balance | 10,679
Comprehensive Income Attributable to Noncontrolling Interest of the Company |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | (44)
Other Comprehensive Income Before Reclassifications | (200)
Amounts Reclassified from Accumulated Other Comprehensive Income | 0
Net Current Period Other Comprehensive Income | (200)
Ending Balance | (244)
Accumulated Other Comprehensive Income of the Company |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | 1,338
Other Comprehensive Income Before Reclassifications | 8,490
Amounts Reclassified from Accumulated Other Comprehensive Income | 607
Net Current Period Other Comprehensive Income | 9,097
Ending Balance | 10,435
First Industrial, L.P. |
Accumulated Other Comprehensive Income [Line Items] |
Net Current Period Other Comprehensive Income | 9,297
First Industrial, L.P. | Accumulated Other Comprehensive Income of the Operating Partnership |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | 1,382
Other Comprehensive Income Before Reclassifications | 8,690
Amounts Reclassified from Accumulated Other Comprehensive Income | 607
Net Current Period Other Comprehensive Income | 9,297
Ending Balance | $ 10,679

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