Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2006
Statutory Federal Income Tax Rate	35.00%
REIT's Book-to-Tax Difference				$ 3,000,000
Reversal of Deferred Tax Liability			2,100,000
Income Tax Reconciliation, Deferred Tax Adjustment, Retiree Health Care Act	0	0	1,441,000
Change in Valuation Allowance	100,000	900,000	300,000
Net Tax Benefit Recognized Related to Interest and Penalties in Tax Provision	$ 0	$ 0	$ 200,000
Minimum [Member]
State Net Operating Losses, Expiration Dates	1 year 0 months 0 days
Maximum [Member]
State Net Operating Losses, Expiration Dates	20 years 0 months 0 days
Tax Credit Carryforward Expiration Date Range	14 years 0 months 0 days