Stockholders' Equity (Stock Rollforward) (Details)			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Common Stock	Sep. 30, 2013 Treasury Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, shares issued, beginning of period	11,197,041	11,155,648	11,155,648
Treasury stock, shares, beginning of period	600,244	607,688		607,688
Changes related to stock-based compensation awards:
Release of restricted common shares, common stock			26,246
Release of restricted common shares, treasury stock				5,207
Changes related to deferred compensation plan:
Purchase of treasury stock				2,577
Re-issuance of treasury stock				(9,147)
Common shares issued under dividend reinvestment plan			15,147
Common shares issued under Board of Directors' compensation plan			0	(6,081)
Common stock, shares issued, end of period	11,197,041	11,155,648	11,197,041
Treasury stock, shares, end of period	600,244	607,688		600,244