Business Combinations (Schedule Of Merger-Related Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Merger-related expenses	$ 360	$ 6,675	$ 273
Professional Fees [Member]
Merger-related expenses	173	2,984	143
Compensation And Relocation [Member]
Merger-related expenses		962	39
Communications [Member]
Merger-related expenses		330	61
Premises And Equipment [Member]
Merger-related expenses	82	630	2
Travel [Member]
Merger-related expenses	11	710
Other Merger Related Expense [Member]
Merger-related expenses	$ 94	$ 1,059	$ 28