Fair Value Measurements (Schedule Of Fair Value Carried At Cost And Measured On A Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		$ 220,168	$ 258,525
Subordinated debt		20,440	20,423
Financial liabilities total		240,608	278,948
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		220,168	258,525
Subordinated debt		20,440	20,423
Financial liabilities total		240,608	278,948
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	[1]	215,624	254,163
Subordinated debt	[1]	30,129	30,796
Financial liabilities total	[1]	$ 245,753	$ 284,959

[1] These balances are presented before any deduction for deferred financing costs.