Business Combinations (Schedule Of Merger-Related Expense) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition [Line Items]
Merger related expenses	$ 2,338,000	$ 360,000	$ 6,675,000
Professional Fees [Member]
Business Acquisition [Line Items]
Merger related expenses	1,145,000	173,000	2,984,000
Compensation And Relocation [Member]
Business Acquisition [Line Items]
Merger related expenses	856,000		962,000
Communications [Member]
Business Acquisition [Line Items]
Merger related expenses	66,000		330,000
Premises And Equipment [Member]
Business Acquisition [Line Items]
Merger related expenses	29,000	82,000	630,000
Travel [Member]
Business Acquisition [Line Items]
Merger related expenses	98,000	11,000	710,000
Other Merger Related Expense [Member]
Business Acquisition [Line Items]
Merger related expenses	$ 144,000	$ 94,000	$ 1,059,000