Short-Term Borrowings (Schedule Of Short-Term Borrowings And Weighted-Average Interest Rates) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Outstanding at end of period	$ 589,815	$ 424,849
Average amount outstanding	413,921	363,623
Weighted average interest rate during period	0.13%	0.15%
Weighted average interest rate at end of period	0.13%	0.26%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Outstanding at end of period	231,688	103,010
Average amount outstanding	89,697	14,302
Maximum amount outstanding at any month-end	251,363	103,010
Weighted average interest rate during period	0.17%	0.09%
Weighted average interest rate at end of period	0.18%	0.12%
Repurchase Agreements [Member]
Short-term Debt [Line Items]
Outstanding at end of period	358,127	321,725
Average amount outstanding	324,215	340,053
Maximum amount outstanding at any month-end	361,490	366,915
Weighted average interest rate during period	0.12%	0.15%
Weighted average interest rate at end of period	0.10%	0.31%
Other Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Outstanding at end of period	0	114
Average amount outstanding	9	9,268
Maximum amount outstanding at any month-end	0	11,336
Weighted average interest rate during period	7.51%	0.17%
Weighted average interest rate at end of period	0.00%	0.04%
Integra Bank N.A [Member]
Short-term Debt [Line Items]
Outstanding at end of period	(7,654)	114
Effective interest rate on other short-term borrowings		7.26%
Maturity date	Jan. 01, 2012
Monroe Bancorp [Member]
Short-term Debt [Line Items]
Outstanding at end of period	$ 62,529