Notes Receivable (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Notes Receivable [Abstract]
Balance, beginning of period	$ 140,630	$ 134,133
Provision for loan losses	56,941	55,701
Less: defaults	(55,527)	(49,204)
Balance, end of period	$ 142,044	$ 140,630