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Reportable Segments Reported Segments - Consolidated Net Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Operations revenues | $ 807,265 | $ 761,409 | $ 713,273
Operations expenses | 402,990 | 381,597 | 356,323
Income from segment operations | 404,275 | 379,812 | 356,950
Interest income | 6,932 | 7,450 | 7,770
Depreciation on real estate assets and rental homes | 113,609 | 111,065 | 108,229
Amortization of in-place leases | 2,358 | 3,999 | 1,940
Income (loss) from operations | 295,240 | 272,198 | 254,551
Reconciliation to Consolidated net income |  |  |
Corporate interest income | 98 | 897 | 490
Income from other investments, net | 7,359 | 7,053 | 7,515
General and administrative | 30,644 | 27,410 | 28,211
Property rights initiatives and other | 2,986 | 2,923 | 2,771
Early debt retirement | 16,913 | 5,087 | 37,844
Interest and related amortization | 105,731 | 112,295 | 118,522
Equity in income of unconsolidated joint ventures | 4,089 | 4,578 | 2,039
Gain on sale of property | 0 | 1,457 | 0
Gain on sale of property, net of tax | 0 | 0 | 41,525
Income from discontinued operations before gain on sale of property | 0 | 0 | 7,133
Consolidated net income | 150,512 | 138,468 | 125,905
Total assets | 3,420,061 | 3,446,339 | 3,392,309
Capital improvements | 93,799 | 63,721 | 64,714
Property Operations Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Operations revenues | 758,834 | 716,942 | 679,992
Operations expenses | 360,353 | 345,067 | 329,468
Income from segment operations | 398,481 | 371,875 | 350,524
Interest income | 2,813 | 2,984 | 3,397
Depreciation on real estate assets and rental homes | 102,747 | 99,980 | 101,374
Amortization of in-place leases | 2,358 | 3,999 | 1,940
Income (loss) from operations | 296,189 | 270,880 | 250,607
Reconciliation to Consolidated net income |  |  |
Total assets | 3,177,531 | 3,178,883 | 3,096,826
Capital improvements | 51,369 | 35,973 | 26,430
Home Sales And Rentals |  |  |
Segment Reporting Information [Line Items] |  |  |
Operations revenues | 48,431 | 44,467 | 33,281
Operations expenses | 42,637 | 36,530 | 26,855
Income from segment operations | 5,794 | 7,937 | 6,426
Interest income | 4,119 | 4,466 | 4,373
Depreciation on real estate assets and rental homes | 10,862 | 11,085 | 6,855
Amortization of in-place leases | 0 | 0 | 0
Income (loss) from operations | (949) | 1,318 | 3,944
Reconciliation to Consolidated net income |  |  |
Total assets | 242,530 | 267,456 | 295,483
Capital improvements | $ 42,430 | $ 27,748 | $ 38,284

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