Organization and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jan. 01, 2019
Accounting Policies [Line Items]
Interest costs capitalized	$ 420	$ 345	$ 886	$ 471
Mortgage loan
Accounting Policies [Line Items]
Mortgage receivable	2,653		2,653
Allowance for credit loss	169		$ 169
Collectability analysis, period used			15 years
Minimum
Accounting Policies [Line Items]
Impact of COVID-19, requested rent deferral			30 days
Impact of COVID-19, requested rent deferral, period of payment			3 months
Initial lease term			10 years
Maximum
Accounting Policies [Line Items]
Impact of COVID-19, requested rent deferral			90 days
Impact of COVID-19, requested rent deferral, period of payment			18 months
Initial lease term			20 years
Notes Payable to Banks
Accounting Policies [Line Items]
Debt costs	31,140		$ 31,140		$ 26,932
Debt costs accumulated amortization	$ 8,096		$ 8,096		$ 8,962
ASC 842
Accounting Policies [Line Items]
Operating lease – ROU assets						$ 7,735
Operating lease – lease liabilities						$ 10,155