Stockholders' Equity (Stock Rollforward) (Details)			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Common Stock	Jun. 30, 2013 Treasury Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, shares issued, beginning of period	11,183,245	11,155,648	11,155,648
Treasury stock, shares, beginning of period	600,084	607,688		607,688
Changes related to stock-based compensation awards:
Release of restricted common shares, common stock			17,666
Release of restricted common shares, treasury stock				3,429
Changes related to deferred compensation plan:
Purchase of treasury stock				712
Re-issuance of treasury stock				(7,703)
Common shares issued under dividend reinvestment plan			9,931
Common shares issued under Board of Directors' compensation plan			0	(4,042)
Common stock, shares issued, end of period	11,183,245	11,155,648	11,183,245
Treasury stock, shares, end of period	600,084	607,688		600,084