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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | $ 187,475 | $ 179,417 | $ 543,908 | $ 538,647
Total Net Operating Income | 123,340 | 118,264 | 358,664 | 358,399
Reconciliation to net income: |  |  |  |
Depreciation and amortization | (60,850) | (57,661) | (189,514) | (171,923)
Impairments of real estate assets | (5,318) | 0 | (5,849) | 0
General and administrative expenses | (11,717) | (9,551) | (33,658) | (30,869)
Interest expense | (20,527) | (17,437) | (59,622) | (53,705)
Other income/(loss) | 174 | 818 | (3,271) | 1,735
Gains on disposition of property | 3,515 | 3 | 10,218 | 16,975
Equity in earnings of unconsolidated affiliates | 940 | 573 | 2,369 | 1,641
Net income | 29,557 | 35,009 | 79,337 | 122,253
Total Office Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 184,194 | 176,260 | 534,187 | 529,073
Total Net Operating Income | 120,948 | 115,928 | 351,590 | 351,321
Office Atlanta, GA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 39,120 | 35,375 | 113,115 | 105,635
Total Net Operating Income | 24,372 | 21,443 | 72,614 | 65,721
Office Greensboro, NC [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 5,524 | 5,349 | 16,611 | 16,753
Total Net Operating Income | 3,500 | 3,372 | 10,715 | 10,817
Office Memphis, TN [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 9,967 | 10,121 | 29,669 | 30,228
Total Net Operating Income | 6,104 | 6,471 | 18,336 | 19,289
Office Nashville, TN [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 34,748 | 29,927 | 99,256 | 91,319
Total Net Operating Income | 25,191 | 21,896 | 71,717 | 66,306
Office Orlando, FL [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 12,854 | 13,352 | 39,781 | 40,103
Total Net Operating Income | 7,889 | 8,195 | 24,452 | 24,551
Office Pittsburgh, PA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 15,154 | 14,982 | 45,463 | 45,587
Total Net Operating Income | 9,150 | 8,969 | 27,179 | 27,189
Office Raleigh, NC [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 30,688 | 30,432 | 90,458 | 89,518
Total Net Operating Income | 22,066 | 22,018 | 65,363 | 65,384
Office Richmond, VA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 12,576 | 11,262 | 37,203 | 33,204
Total Net Operating Income | 8,337 | 7,376 | 25,499 | 22,616
Office Tampa, FL [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 23,563 | 25,460 | 62,631 | 76,726
Total Net Operating Income | 14,339 | 16,188 | 35,715 | 49,448
Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Rental and Other Revenues | 3,281 | 3,157 | 9,721 | 9,574
Total Net Operating Income | $ 2,392 | $ 2,336 | $ 7,074 | $ 7,078

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