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Financial Information for Operation Segments (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  |  |  |  |  |  |  |  | $ 75,208,000 | $ 61,848,000 | $ 40,009,000
Revenues: |  |  |  |  |  |  |  |  |  |  |
Community Base Rental Income |  |  |  |  |  |  |  |  | 409,801,000 | 394,606,000 | 309,230,000
Gross revenue from home sales |  |  |  |  |  |  |  |  | 17,871,000 | 8,230,000 | 6,028,000
Resort base rental income |  |  |  |  |  |  |  |  | 147,234,000 | 134,327,000 | 130,489,000
Brokered resale revenues, net |  |  |  |  |  |  |  |  | 4,212,000 | 3,093,000 | 3,483,000
Right-to-use annual payments |  |  |  |  |  |  |  |  | 47,967,000 | 47,662,000 | 49,122,000
Rental operations revenues |  |  |  |  |  |  |  |  | 3,400,000 | 3,300,000 | 2,500,000
Right-to-use contracts current period, gross |  |  |  |  |  |  |  |  | 13,142,000 | 13,433,000 | 17,856,000
Right-to-use contracts current period, deferred |  |  |  |  |  |  |  |  | (5,694,000) | (6,694,000) | (11,936,000)
Utility income and other |  |  |  |  |  |  |  |  | 63,800,000 | 62,470,000 | 53,116,000
Expenses: |  |  |  |  |  |  |  |  |  |  |
Property operating and maintenance |  |  |  |  |  |  |  |  | 229,897,000 | 220,415,000 | 197,781,000
Cost of home sales |  |  |  |  |  |  |  |  | 17,296,000 | 9,018,000 | 5,615,000
Real estate taxes |  |  |  |  |  |  |  |  | 48,279,000 | 45,590,000 | 36,528,000
Home selling expenses |  |  |  |  |  |  |  |  | 2,085,000 | 1,391,000 | 1,591,000
Sales and marketing, gross |  |  |  |  |  |  |  |  | 12,836,000 | 10,845,000 | 11,218,000
Sales and marketing deferred commissions, net |  |  |  |  |  |  |  |  | (2,410,000) | (3,155,000) | (4,789,000)
Property management |  |  |  |  |  |  |  |  | 40,193,000 | 37,999,000 | 34,846,000
Total expenses |  |  |  |  |  |  |  |  | 653,167,000 | 621,858,000 | 537,000,000
Rental home income |  |  |  |  |  |  |  |  | 14,267,000 | 11,649,000 | 7,245,000
Total revenues | 179,881,000 | 187,966,000 | 176,753,000 | 183,775,000 | 165,312,000 | 175,064,000 | 168,383,000 | 174,947,000 | 728,375,000 | 683,706,000 | 577,009,000
Rental home operating and maintenance |  |  |  |  |  |  |  |  | 7,474,000 | 6,369,000 | 4,493,000
Property Operations segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  |  |  |  |  |  |  |  | 350,524,000 | 336,037,000 | 274,945,000
Revenues: |  |  |  |  |  |  |  |  |  |  |
Community Base Rental Income |  |  |  |  |  |  |  |  | 409,801,000 | 394,606,000 | 309,230,000
Resort base rental income |  |  |  |  |  |  |  |  | 147,234,000 | 134,327,000 | 130,489,000
Right-to-use annual payments |  |  |  |  |  |  |  |  | 47,967,000 | 47,662,000 | 49,122,000
Right-to-use contracts current period, gross |  |  |  |  |  |  |  |  | 13,142,000 | 13,433,000 | 17,856,000
Right-to-use contracts current period, deferred |  |  |  |  |  |  |  |  | (5,694,000) | (6,694,000) | (11,936,000)
Utility income and other |  |  |  |  |  |  |  |  | 63,800,000 | 62,470,000 | 53,116,000
Ancillary services revenues, net |  |  |  |  |  |  |  |  | 3,069,000 | 1,927,000 | 2,652,000
Expenses: |  |  |  |  |  |  |  |  |  |  |
Property operating and maintenance |  |  |  |  |  |  |  |  | 229,897,000 | 220,415,000 | 197,781,000
Real estate taxes |  |  |  |  |  |  |  |  | 48,279,000 | 45,590,000 | 36,528,000
Sales and marketing, gross |  |  |  |  |  |  |  |  | 12,836,000 | 10,845,000 | 11,218,000
Sales and marketing deferred commissions, net |  |  |  |  |  |  |  |  | (2,410,000) | (3,155,000) | (4,789,000)
Property management |  |  |  |  |  |  |  |  | 40,193,000 | 37,999,000 | 34,846,000
Total expenses |  |  |  |  |  |  |  |  | 328,795,000 | 311,694,000 | 275,584,000
Total revenues |  |  |  |  |  |  |  |  | 679,319,000 | 647,731,000 | 550,529,000
Home Sales and Rentals Operations segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  |  |  |  |  |  |  |  | 6,426,000 | 4,267,000 | 2,405,000
Revenues: |  |  |  |  |  |  |  |  |  |  |
Gross revenue from home sales |  |  |  |  |  |  |  |  | 17,871,000 | 8,230,000 | 6,028,000
Brokered resale revenues, net |  |  |  |  |  |  |  |  | 1,143,000 | 1,166,000 | 831,000
Expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of home sales |  |  |  |  |  |  |  |  | 17,296,000 | 9,018,000 | 5,615,000
Home selling expenses |  |  |  |  |  |  |  |  | 2,085,000 | 1,391,000 | 1,591,000
Total expenses |  |  |  |  |  |  |  |  | 26,855,000 | 16,778,000 | 11,699,000
Rental home income |  |  |  |  |  |  |  |  | 14,267,000 | 11,649,000 | 7,245,000
Total revenues |  |  |  |  |  |  |  |  | 33,281,000 | 21,045,000 | 14,104,000
Rental home operating and maintenance |  |  |  |  |  |  |  |  | $ 7,474,000 | $ 6,369,000 | $ 4,493,000

X
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- Definition Revenue earned during the period from renting out homes of the reporting entity. + References No definition available. + Details
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- Definition Rental home operating costs incurred during the reporting period and may include amounts paid to maintain the homes. + References No definition available. + Details
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- Definition Upfront payments received from right to use contracts. The contracts give members the right to use certain properties on a continuous basis up to 21 days. + References No definition available. + Details
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- Definition Other operating costs incurred during the reporting period and may include amounts paid to maintain the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707 + Details
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- Definition Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a),(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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