Fair Value Of Assets and Liabilities (Schedule Of Valuation Techniques And Significant Unobservable Inputs Used To Measure Both Recurring And Non-Recurring) (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended						3 Months Ended					3 Months Ended									3 Months Ended
	Mar. 31, 2014 Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Impaired Loans [Member] Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Other Real Estate Owned [Member] Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Municipal Bonds [Member]	Dec. 31, 2013 Municipal Bonds [Member]	Mar. 31, 2013 Municipal Bonds [Member]	Dec. 31, 2012 Municipal Bonds [Member]	Mar. 31, 2014 Municipal Bonds [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Equity Securities [Member]	Dec. 31, 2013 Equity Securities [Member]	Mar. 31, 2013 Equity Securities [Member]	Dec. 31, 2012 Equity Securities [Member]	Mar. 31, 2014 Equity Securities [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Minimum [Member] Other Real Estate Owned [Member] Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Minimum [Member] Equity Securities [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Maximum [Member] Other Real Estate Owned [Member] Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2014 Maximum [Member] Equity Securities [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Mortgage Servicing Rights [Member]	Dec. 31, 2013 Mortgage Servicing Rights [Member]	Mar. 31, 2013 Mortgage Servicing Rights [Member]	Dec. 31, 2012 Mortgage Servicing Rights [Member]	Mar. 31, 2014 Mortgage Servicing Rights [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Mortgage Servicing Rights [Member] Minimum [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Mortgage Servicing Rights [Member] Maximum [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Mortgage Servicing Rights Discount Rate Input [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Mar. 31, 2014 Mortgage Servicing Rights Prepayment Rate Input [Member] Level 3 [Member] Fair Value, Measurements, Recurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value					$ 39,772	$ 36,386	$ 32,324	$ 30,770		$ 23,438	$ 22,163	$ 24,470	$ 22,169						$ 8,719	$ 8,946	$ 7,344	$ 6,750
Impaired loans - collateral based	68,355	68,355
Other real estate owned	$ 129,279	$ 129,279
Valuation Methodology			Appraisal value	Appraisal value					Bond pricing					Discounted cash flows									Discounted cash flows
Significant Unobservable Input				Property specific impairment adjustment					Equivalent rating					Discount rate												Discount rate	Constant prepayment rate (CPR)
Level 3 Fair Value Measurements Range of Inputs				0%-84%					BBB-AA+					1.44%-2.33%												9.5%-13%	10%-15%
Weighted Average of Inputs				4.65%										1.93%												9.66%	11.95%
Impact to valuation from an increased or higher input value				Decrease					Increase					Decrease												Decrease	Decrease
Fair Value Inputs, Discount Rate															0.00%	1.44%	84.00%	2.33%						9.50%	13.00%
Fair Value Inputs, Prepayment Rate																								10.00%	15.00%