Fair Value Measurements (Schedule Of Fair Value Carried At Cost And Measured On A Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		$ 162,880	$ 143,564
Subordinated debt		19,188	18,895
Financial liabilities total		182,068	162,459
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		162,880	143,564
Subordinated debt		19,188	18,895
Financial liabilities total		182,068	162,459
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	[1]	158,724	139,130
Subordinated debt	[1]	27,913	27,913
Financial liabilities total	[1]	$ 186,637	$ 167,043

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