Derivative Financial Instruments Derivative Financial Instruments (Schedule Of Fair Value Of Derivative Financial Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	$ 37,461	$ 37,956	$ 38,118
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	36,733	34,807	33,788
Other Assets [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	50,967	48,221	60,554
Other Assets [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	1,728	1,883	2,240
Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	49,239	46,338	58,314
Other Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	43,650	37,264	37,654
Other Liabilities [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	2,730	3,161	4,416
Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	40,920	34,103	33,238
Interest Rate Contract [Member] | Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	35,733	36,073	35,878
Interest Rate Contract [Member] | Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	34,003	31,646	29,372
Interest Rate Contract [Member] | Cash Flow Hedging [Member] | Other Assets [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	1,663	1,776	2,146
Interest Rate Contract [Member] | Cash Flow Hedging [Member] | Other Liabilities [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	2,727	3,160	4,416
Interest Rate Contract [Member] | Fair Value Hedging [Member] | Other Assets [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	65	107	94
Interest Rate Contract [Member] | Fair Value Hedging [Member] | Other Liabilities [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	3	1	0
Interest Rate Lock Commitments [Member] | Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	13,479	7,500	14,579
Interest Rate Lock Commitments [Member] | Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	9	147	3,208
Forward Commitments to Sell Mortgage Loans [Member] | Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	27	2,761	7,835
Forward Commitments to Sell Mortgage Loans [Member] | Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	6,901	2,310	583
Foreign Exchange Contract [Member] | Other Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Fair Value, Amount not Offset Against Collateral	0	4	22
Foreign Exchange Contract [Member] | Other Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liabilities, Fair Value, Amount Not Offset Against Collateral	$ 7	$ 0	$ 75