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Accumulated Other Comprehensive Income (Changes in AOCI) (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($)
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | $ 1,475,877
Net Current Period Other Comprehensive Income | 10,999
Ending Balance | 1,663,025
Interest Rate Protection Agreements |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | 1,382
Other Comprehensive Income Before Reclassifications | 10,470
Amounts Reclassified from Accumulated Other Comprehensive Income | 529
Net Current Period Other Comprehensive Income | 10,999
Ending Balance | 12,381
Comprehensive Income Attributable to Noncontrolling Interest of the Company |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | (44)
Other Comprehensive Income Before Reclassifications | (208)
Amounts Reclassified from Accumulated Other Comprehensive Income | 0
Net Current Period Other Comprehensive Income | (208)
Ending Balance | (252)
Accumulated Other Comprehensive Income of the Company |
Accumulated Other Comprehensive Income [Line Items] |
Beginning Balance | 1,338
Other Comprehensive Income Before Reclassifications | 10,262
Amounts Reclassified from Accumulated Other Comprehensive Income | 529
Net Current Period Other Comprehensive Income | 10,791
Ending Balance | 12,129
First Industrial, L.P. |
Accumulated Other Comprehensive Income [Line Items] |
Net Current Period Other Comprehensive Income | 10,999
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 | 10,470
Amounts Reclassified from Accumulated Other Comprehensive Income | 529
Net Current Period Other Comprehensive Income | 10,999
Ending Balance | $ 12,381

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