Commitments And Contingencies (Narrative) (Details)				3 Months Ended		12 Months Ended
	Apr. 17, 2019 USD ($)	Jan. 07, 2019 USD ($)	Feb. 28, 2018 item	Mar. 31, 2019 USD ($) store	Mar. 31, 2018 USD ($)	Dec. 31, 2015	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Payments to subsidies				$ 1,900,000
Accrued liabilities and other				80,827,000				$ 80,364,000
Amount of future payment				1,400,000
Inventory purchased				$ 8,237,000	$ 9,673,000
Average annual default rates				8.20%		6.90%
Percent of total delinquencies subject to letters				15.80%
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				$ 4,200,000				$ 0
Executive [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Amount of future payment				$ 0					$ 2,900,000
Executive [Member] | Scenario, Forecast [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Amount of future payment							$ 2,000,000
Minimum [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Damages sought from lawsuit		$ 500,000
Bass Pro [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of stores vacation packages are sold | store				69
Percent of volume sales from agreement				12.00%	12.00%
Bass Pro [Member] | Subsequent Event [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Damages sought from lawsuit	$ 10,000,000