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Deferred Revenue-Right-to-use contracts and Deferred commission expense - Additional 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
Deferred Revenue Arrangement [Line Items] |  |  |  |
Deferred revenue - right-to-use contracts, as of January 1 |  |  | $ 62,979 | $ 56,285
Right To Use Contracts Current Period Gross | 3,361 | 2,942 | 6,192 | 5,186
Recognition of Deferred Revenue |  |  | (3,602) | (3,295)
Deferred Revenue, Period Increase (Decrease) |  |  | 2,590 | 1,891
Deferred revenue - right-to-use contracts, as of June 30 | 65,569 | 58,176 | 65,569 | 58,176
Deferred commission expense, as of January 1 |  |  | 22,841 | 19,687
Increase (Decrease) in Deferred Charges |  |  | 2,393 | 2,010
Commission expense recognized related to right-to-use contracts |  |  | (1,275) | (1,113)
Sales And Marketing Deferred Commissions Net | 655 | 655 | 1,118 | 897
Deferred commission expense, as of June 30 | $ 23,959 | $ 20,584 | $ 23,959 | $ 20,584
Minimum |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |
Deferred Revenue Estimated Period Of Recognition | 1 year |  | 1 year |
Maximum |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |
Deferred Revenue Estimated Period Of Recognition | 31 years |  | 31 years |

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- Definition Commission expense recognized related to right-to-use contract sales. + References No definition available. + Details
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- Definition The estimated period of recognition of revenue for members. + 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 Deferral of commission expenses associated with right to use contracts. + References No definition available. + Details
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- Definition The carrying amount of deferred costs. + References No definition available. + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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- Definition The net addition or reduction in the carrying amount of deferred revenue during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).(Q1)) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 + Details
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- Definition The increase (decrease) during the reporting period in the value of expenditures made during the current reporting period for benefits that will be received over a period of years. Deferred charges differ from prepaid expenses in that they usually extend over a long period of time and may or may not be regularly recurring costs of operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A -Subsection 1 + Details
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