Common Stock (Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Performance level payout	100.00%
Restricted Stock [Member]
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount	59,800	94,076	73,084	78,792
Performance Shares [Member]
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount	0	0	0	24,225
Stock Options [Member]
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount	0	0	0	0