Common Stock (Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Performance shares payout based upon performance 0 0 0 0 0 0
Performance shares payout level 100.00% 100.00% 100.00% 100.00% 100.00% 100.00%
Restricted Stock            
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount 57,633 65,076 53,285 60,647 50,854 60,742
Performance Shares            
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount [1] 62,995 59,898 62,995 59,898 62,995 63,111
[1] Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.