Debt (Lines-Of-Credit And Notes Payable) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total	$ 136,796	$ 133,391
Carrying Amount of Pledged Assets	189,875	186,524
Lines-Of-Credit And Notes Payable [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs	(1,245)	(1,671)
2013 Notes Payable [Member]
Debt Instrument [Line Items]
Balance	$ 16,875	$ 28,125
Interest Rate	5.50%	5.50%
Carrying Amount of Pledged Assets	$ 21,106	$ 22,878
Fifth Third Bank Note Payable [Member]
Debt Instrument [Line Items]
Balance	$ 3,711	$ 3,834
Interest Rate	5.44%	5.34%
Carrying Amount of Pledged Assets	$ 7,802	$ 7,892
NBA Eilan Loan [Member]
Debt Instrument [Line Items]
Balance	$ 20,893	$ 25,603
Interest Rate	5.69%	5.60%
Carrying Amount of Pledged Assets	$ 30,880	$ 35,615
Fifth Third Syndicated LOC [Member]
Debt Instrument [Line Items]
Balance	$ 75,000	$ 55,000
Interest Rate	5.11%	5.27%
Carrying Amount of Pledged Assets	$ 101,038	$ 92,415
Fifth Third Syndicated Term Loan [Member]
Debt Instrument [Line Items]
Balance	$ 21,562	$ 22,500
Interest Rate	5.08%	5.37%
Carrying Amount of Pledged Assets	$ 29,049	$ 27,724