Fair Value Measurements (Schedule Of Fair Value Carried At Cost And Measured On A Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		$ 159,871	$ 143,564
Subordinated debt		19,162	18,895
Financial liabilities total		179,033	162,459
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		159,871	143,564
Subordinated debt		19,162	18,895
Financial liabilities total		179,033	162,459
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	[1]	155,855	139,130
Subordinated debt	[1]	27,913	27,913
Financial liabilities total	[1]	$ 183,768	$ 167,043

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