Debt (Lines-Of-Credit and Notes Payable, Narrative) (Details) - USD ($) $ in Thousands		6 Months Ended
	Apr. 17, 2018	Jun. 30, 2018	Jun. 30, 2017	[1]
Debt Instrument [Line Items]
Proceeds from borrowings collaterized by line-of-credit facilities and notes payable		$ 50,042	$ 30,000
Availablility of line of credits/credit facilities		140,500
NBA Eilan Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 27,500
Proceeds from borrowings collaterized by line-of-credit facilities and notes payable	24,300
Availablility of line of credits/credit facilities	$ 3,200
Non-revolving term loan		$ 24,258
Line of credit, advance period		12 months
NBA Eilan Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Effective rate	4.75%
NBA Eilan Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on rate	3.25%
The Eilan Hotel And Spa [Member]
Debt Instrument [Line Items]
Purchase consideration	$ 34,300

[1] * See Note 2 for summary of adjustments.