Notes Receivable (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Notes Receivable [Abstract]
Balance, beginning of period	$ 134,222	$ 123,791
Provision for loan losses	39,462	35,866
Less: Write-offs of uncollectible receivables	(38,339)	(31,358)
Balance, end of period	$ 135,345	$ 128,299