Fair Value Measurements (Schedule Of Fair Value Carried At Cost And Measured On A Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		$ 248,948	$ 181,916
Subordinated debt		20,722	22,132
Financial liabilities total		269,670	204,048
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		248,948	181,916
Subordinated debt		20,722	22,132
Financial liabilities total		269,670	204,048
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	[1]	244,955	177,942
Subordinated debt	[1]	30,958	31,276
Financial liabilities total	[1]	$ 275,913	$ 209,218

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