Summary of Significant Accounting Policies Tax (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets Gross	$ 79,600,000
Income Tax Expense (Benefit)	1,169,000	514,000	706,000
Discontinued Operation, Tax Effect of Discontinued Operation	449,000	34,000	(221,000)
Provision for income, franchise and excise taxes	1,618,000	548,000	485,000
Operating Loss Carryforwards	63,100,000
Tax Treatment Of Dividends And Distributions Ordinary Dividends	$ 0.662	$ 1.375	$ 0.667
Tax Treatment Of Dividends And Distributions Qualified Dividends	$ 0.050	$ 0.000	$ 0.000
Tax Treatment Of Dividends And Distributions Long Term Capital Gain	$ 0.870	$ 0.253	$ 0.629
Tax Treatment Of Dividends And Distributions Unrecaptured Section Twelve Hundred And Fifty Gain	$ 0.268	$ 0.152	$ 0.284
Distributions declared per Common Share outstanding	$ 1.850	$ 1.780	$ 1.580
Land And Depreciable Property Net	$ 15,200,000,000	$ 11,200,000,000
Minimum [Member]
Operating Loss Carryforwards, Expiration Dates	Jan. 01, 2028
Maximum [Member]
Operating Loss Carryforwards, Expiration Dates	Dec. 31, 2032