Stock-Based Compensation, Dividend Restrictions, And Calculations Of Earnings Per Share Of Common Stock (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 years
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Range of exercise prices, lower range	$ 19.03
Range of exercise prices, upper range	$ 22.69
Outstanding options, weighted average exercise price	$ 22.30
Exercisable options, weighted average remaining contractual term	0.03
Number of options outstanding, balance	280,266
Outstanding options, weighted average remaining contractual term	0.70
Exercisable options, weighted average exercise price	$ 20.75
Number of exercisable options, balance	30,925
Options exercised, weighted average exercise price	$ 19.03
Options forfeited or expired, weighted average exercise price	$ 24.19
Number of options outstanding, balance	30,925
Outstanding options, weighted average exercise price	$ 20.75
Outstanding options, weighted average remaining contractual term	0.03
Options forfeited or expired, number of options	167,423
Options exercised, number of options	81,918