Annual report pursuant to Section 13 and 15(d)

Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Details)

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Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jan. 01, 2020
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
Schedule of Equity Method Investments [Line Items]            
Minimum percentage of sales price for revenue on VOI sales to be recognized     90.00%      
Management contracts, initial term     3 years      
Management contracts, renewal term     1 year      
Period VOI notes receivable written off     127 days      
Inventory impairment charges     $ 0 $ 0    
Unamortized deferred financing costs     12,300,000 13,100,000    
Interest expense from the amortization of deferred financing costs     4,100,000 3,500,000 $ 3,100,000  
Internal use software capitalized costs     9,600,000 10,000,000.0    
Intangible assets, impairment charges     $ 0 $ 0 $ 0  
Corporate tax rate     21.00% 35.00%    
Tax Cuts and Jobs Act of 2017, income tax benefit   $ 47,700,000        
Earnings per share, potentially dilutive amount     0 0 0  
Advertising expense     $ 144,300,000 $ 136,900,000 $ 147,100,000  
Minimum percent of VOI sales generated by one marketing arrangement     13.00% 14.00% 15.00%  
Operating lease liability     $ 22,124,000      
Operating lease asset     20,858,000      
Accounting Standards Update 2016-02 [Member]            
Schedule of Equity Method Investments [Line Items]            
Operating lease liability           $ 26,500,000
Operating lease asset           $ 25,600,000
90 Days Or More [Member]            
Schedule of Equity Method Investments [Line Items]            
Notes receivable past due     $ 25,500,000 $ 20,400,000    
Maximum [Member]            
Schedule of Equity Method Investments [Line Items]            
Property, plant and equipment, useful life     5 years      
Maximum [Member] | Scenario, Plan [Member] | Accounting Standards Update 2018-15 [Member] | Reclassification From Property And Equipment To Prepaid Expenses [Member]            
Schedule of Equity Method Investments [Line Items]            
Expected effect of adoption of accounting standard $ 2,500,000          
Minimum [Member]            
Schedule of Equity Method Investments [Line Items]            
Property, plant and equipment, useful life     3 years      
Minimum [Member] | Scenario, Plan [Member] | Accounting Standards Update 2018-15 [Member] | Reclassification From Property And Equipment To Prepaid Expenses [Member]            
Schedule of Equity Method Investments [Line Items]            
Expected effect of adoption of accounting standard $ 1,500,000