Debt (Lines-Of-Credit And Notes Payable) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total	$ 119,045	$ 133,391
Carrying Amount of Pledged Assets	171,818	186,524
Lines-Of-Credit And Notes Payable [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs	(672)	(1,671)
2013 Notes Payable [Member]
Debt Instrument [Line Items]
Balance		$ 28,125
Interest Rate		5.50%
Carrying Amount of Pledged Assets		$ 22,878
Fifth Third Bank Note Payable [Member]
Debt Instrument [Line Items]
Balance	$ 3,649	$ 3,834
Interest Rate	5.11%	5.34%
Carrying Amount of Pledged Assets	$ 7,757	$ 7,892
NBA Eilan Loan [Member]
Debt Instrument [Line Items]
Balance	$ 19,974	$ 25,603
Interest Rate	5.34%	5.60%
Carrying Amount of Pledged Assets	$ 32,821	$ 35,615
Fifth Third Syndicated LOC [Member]
Debt Instrument [Line Items]
Balance	$ 75,000	$ 55,000
Interest Rate	4.88%	5.27%
Carrying Amount of Pledged Assets	$ 102,431	$ 92,415
Fifth Third Syndicated Term Loan [Member]
Debt Instrument [Line Items]
Balance	$ 21,094	$ 22,500
Interest Rate	5.08%	5.37%
Carrying Amount of Pledged Assets	$ 28,809	$ 27,724