Common Stock (Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details)	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Performance level payout					100.00%
Restricted Stock [Member]
Shares excluded from the computation of diluted earnings per share	90,358		77,959		84,691		74,263		83,091		72,798
Performance Shares [Member]
Shares excluded from the computation of diluted earnings per share	0	[1]	0	[1]	0	[1]	32,300	[1]	0	[1]	24,225	[1]
Stock Options [Member]
Shares excluded from the computation of diluted earnings per share	0		0		0		0		0		0

[1] Performance shares excluded from the computation of diluted earnings per share assume a 100% performance level payout,as no payouts would be required based upon performance at the end of each corresponding period.