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Revenues and NOI for Reportable Segment (Detail) - Parent Company [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Information |  |  |  |
Total operating revenues | $ 397,108 | $ 384,550 | $ 1,173,198 | $ 1,146,249
Net Operating Income | 242,368 | 235,371 | 725,324 | 709,828
Depreciation and amortization | (124,549) | (117,928) | (368,218) | (374,285)
Other Cost and Expense, Operating | 11,303 | 10,281 | 35,579 | 32,007
General and administrative expense | (6,380) | (8,361) | (25,723) | (30,735)
Business Combination, Merger and Integration Related Expenses | (1,878) | (4,130) | (8,503) | (14,498)
Interest expense | (44,650) | (39,940) | (129,140) | (115,005)
Gain (Loss) on sale of depreciable real estate assets excluded from discontinued operations | (23) | 58,844 | (21) | 59,045
Gain on sale of non-depreciable real estate assets | 959 | (6) | 3,870 | 42
Other Nonoperating Income (Expense) | 374 | 5,695 | 6,065 | 11,033
Income tax expense | (616) | (641) | (1,826) | (1,910)
Gain (loss) from real estate joint ventures | 402 | 335 | 1,256 | 1,021
Net income attributable to noncontrolling interests | (1,913) | (4,249) | (5,888) | (7,600)
Preferred Stock Dividends, Income Statement Impact | (922) | (922) | (2,766) | (2,766)
Net income available for MAA common shareholders | 51,869 | 113,787 | 158,851 | 202,163
Same Store [Member] |  |  |  |
Segment Information |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 337,441 | 330,137 | 1,002,401 | 983,863
Property Management Fee Revenue | 22,477 | 22,553 | 66,771 | 66,313
Other Operating Income | 3,133 | 3,145 | 9,229 | 9,586
Total operating revenues | 363,051 | 355,835 | 1,078,401 | 1,059,762
Net Operating Income | 224,290 | 220,152 | 673,840 | 661,809
Non-Same Store and Other |  |  |  |
Segment Information |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 32,255 | 27,047 | 89,509 | 79,543
Property Management Fee Revenue | 1,437 | 1,408 | 4,027 | 4,420
Other Operating Income | 365 | 260 | 1,261 | 2,524
Total operating revenues | 34,057 | 28,715 | 94,797 | 86,487
Net Operating Income | $ 18,078 | $ 15,219 | $ 51,484 | $ 48,019

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