Commitments And Contingencies (Narrative) (Details)			1 Months Ended			3 Months Ended		12 Months Ended
	Apr. 02, 2021 USD ($)	Feb. 28, 2018 item	Jan. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($) item	Mar. 31, 2021 USD ($) item	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2015	Dec. 31, 2020 USD ($)	Aug. 30, 2020 item	Jul. 07, 2020 plaintiff
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Annual fee for each store assessed			$ 6,900,000
Fixed fee prepaid						$ 5,200,000
Payments for legal settlements						1,700,000	$ 1,400,000
Payments to subsidies						1,600,000	1,900,000
Accrued liabilities and other						97,629,000				$ 98,471,000
Inventory purchased						$ (2,032,000)	$ 356,000
Required period VOIs to be purchased, legal settlement						6 years
Average annual default rates						9.60%			6.90%
Reduction of traffic in stores percentage						25.00%
Number of non-exempt employees represented | item		660
Subsidies To Certain HOAs [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Accrued liabilities and other						$ 4,700,000				0
Former CEO [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Severance expense				$ 3,500,000
Amount of future payment						600,000
Period of future payment				18 months
Bass Pro [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Litigation settlement					$ 20,000,000.0
Settlement agreement, number of annual payments | item					5
Settlement agreement, payment amount					$ 4,000,000.0	4,000,000.0
Accrued claims						$ 10,900,000				$ 14,700,000
Number of stores vacation packages are sold | item						59
Percent of volume sales from agreement						13.00%	10.00%
Cabela [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of stores vacation packages are sold | item						60
Bass Pro And Cabela [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of stores open | item						105
Robert Barban [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of plaintiffs | plaintiff												172
The Manhattan Club [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Litigation settlement								$ 6,500,000
Number of VOI owners | item											100
New York Urban [Member] | Subsequent Event [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Litigation settlement	$ 70,000,000
New York Urban [Member] | Purchase Commitment [Member] | Subsequent Event [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Litigation settlement	$ 50,000,000
Notes Receivable Secured By VOIs [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Average annual default rates						11.90%