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Segment Financial Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |
Segment Reporting Information, Revenue for Reportable Segment | $ 173,053 | $ 164,908 | $ 352,450 | $ 336,257 |
Operations expenses | (88,941) | (83,875) | (173,608) | (163,645) |
Operating Income Loss Before Depreciation And Other | 84,112 | 81,033 | 178,842 | 172,612 |
Interest Income | 1,957 | 1,797 | 3,735 | 3,792 |
Depreciation on real estate and rental homes | (29,313) | (25,523) | (55,333) | (50,947) |
Amortization of Intangible Assets for Continuing Operations | (159) | (15,650) | (318) | (31,265) |
Operating Income (Loss) | 56,597 | 41,657 | 126,926 | 94,192 |
Reconciliation to Consolidated net income |  |  |  |  |
Other Revenues | 1,743 | 1,678 | 4,343 | 3,275 |
General and administrative | (6,946) | (6,810) | (13,655) | (12,909) |
Interest and related amortization | (30,377) | (30,705) | (60,500) | (61,528) |
Payments of Debt Extinguishment Costs | (1,381) | 0 | (1,381) | 0 |
Rent control initiatives and other | (1,624) | (367) | (1,856) | (846) |
Equity in income of unconsolidated joint ventures | 609 | 492 | 1,185 | 1,255 |
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax | 3,165 | 353 | 6,233 | 513 |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax | 0 | 0 | 958 | 0 |
Total assets | 3,521,129 | 3,498,650 | 3,521,129 | 3,498,650 | 3,398,226
Assets of Disposal Group, Including Discontinued Operation | 120,049 | 118,252 | 120,049 | 118,252 | 119,852
Capital improvements |  |  | 35,850 | 30,560 |
Property Operations Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment Reporting Information, Revenue for Reportable Segment | 164,940 | 159,870 | 337,930 | 326,306 |
Operations expenses | (83,081) | (79,681) | (162,570) | (155,542) |
Operating Income Loss Before Depreciation And Other | 81,859 | 80,189 | 175,360 | 170,764 |
Interest Income | 932 | 782 | 1,733 | 1,636 |
Depreciation on real estate and rental homes | (27,599) | (24,149) | (51,975) | (48,257) |
Amortization of Intangible Assets for Continuing Operations | (159) | (15,346) | (318) | (30,657) |
Operating Income (Loss) | 55,033 | 41,476 | 124,800 | 93,486 |
Reconciliation to Consolidated net income |  |  |  |  |
Capital improvements |  |  | 13,571 | 13,349 |
Home Sales and Rentals Operations segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment Reporting Information, Revenue for Reportable Segment | 8,113 | 5,038 | 14,520 | 9,951 |
Operations expenses | (5,860) | (4,194) | (11,038) | (8,103) |
Operating Income Loss Before Depreciation And Other | 2,253 | 844 | 3,482 | 1,848 |
Interest Income | 1,025 | 1,015 | 2,002 | 2,156 |
Depreciation on real estate and rental homes | (1,714) | (1,374) | (3,358) | (2,690) |
Amortization of Intangible Assets for Continuing Operations | 0 | (304) | 0 | (608) |
Operating Income (Loss) | 1,564 | 181 | 2,126 | 706 |
Reconciliation to Consolidated net income |  |  |  |  |
Capital improvements |  |  | 22,279 | 17,211 |
Segment, Discontinued Operations [Member] |  |  |  |  |
Reconciliation to Consolidated net income |  |  |  |  |
Interest and related amortization | 131 | 133 | 260 | 266 |
Segment, Continuing Operations [Member] |  |  |  |  |
Reconciliation to Consolidated net income |  |  |  |  |
Total assets | 3,401,080 | 3,380,398 | 3,401,080 | 3,380,398 |
Segment, Continuing Operations [Member] | Property Operations Segment [Member] |  |  |  |  |
Reconciliation to Consolidated net income |  |  |  |  |
Total assets | 3,104,484 | 3,175,796 | 3,104,484 | 3,175,796 |
Segment, Continuing Operations [Member] | Home Sales and Rentals Operations segment |  |  |  |  |
Reconciliation to Consolidated net income |  |  |  |  |
Total assets | $ 296,596 | $ 204,602 | $ 296,596 | $ 204,602 |

X
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