Investments In Marketable Securities (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	$ 4,089,000
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	5,758,000
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	7,220,000
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	34,667,000	$ 11,415,000
Dividend Income On Marketable Securities	$ 1,330,000	$ 716,000	$ 667,000
LTC Properties, Inc. [Member]
Equity Investment, Shares Sold	1,000,000
Proceeds from Sale of Available-for-sale Securities, Equity	$ 42,164,000
Available-for-sale Securities, Gross Realized Gains	23,098,000
Common Stock, Healthcare REIT [Member]
Proceeds from Sale of Available-for-sale Securities, Equity	2,448,000
Available-for-sale Securities, Gross Realized Gains	334,000
Callable 2016 [Member]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	5,020,000
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	2,000,000
Callable 2018 [Member]
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	$ 1,645,000