Stock Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, percentage of discounted price from market price			85.00%
Actual percentage of target number of shares of common stock granted as Performance Stock Units					125.00%
Employees purchased common stock, shares			97,000	72,000
Capitalized stock compensation expense	$ 54,000	$ 53,000	$ 166,000	$ 157,000
RSAs, RSUs, And PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized stock incentive plans to non-employee Directors and certain Company officers, shares			395,000
Aggregate market value of issued stock incentive plans			2,400,000
Unrecognized compensation costs	2,800,000		2,800,000
RSAs And PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized stock incentive plans to non-employee Directors and certain Company officers, shares				387,000
Aggregate market value of issued stock incentive plans				2,100,000
Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted-average period for recognizing the unrecognized compensation costs, in years			1 year 2 months 1 day
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized stock incentive plans to certain Company officers and employees, shares			162,000	159,000
Unrecognized compensation costs	$ 730,000		$ 730,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years			1 year 4 months 21 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted-average period for recognizing the unrecognized compensation costs, in years			1 year 6 months 4 days
Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted-average period for recognizing the unrecognized compensation costs, in years			1 year 22 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares of common stock granted as Performance Stock Units			50.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares of common stock granted as Performance Stock Units			150.00%