Fair Value Measurements (Schedule Of Valuation Methodology And Unobservable Inputs) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Fair Value Measurements [Line Items]
Impaired Loans, Fair Value	$ 42,194
Other Real Estate, Fair Value	3,050
Mortgage Servicing Rights, Fair Value	$ 23,384
Discount for costs to sell [Member]
Fair Value Measurements [Line Items]
Range of Inputs	8.00%
Minimum [Member] | Discount for date appraisal [Member]
Fair Value Measurements [Line Items]
Range of Inputs	0.00%
Minimum [Member] | Discount for costs to sell [Member]
Fair Value Measurements [Line Items]
Range of Inputs	3.00%
Minimum [Member] | Discount for appraisal type [Member]
Fair Value Measurements [Line Items]
Range of Inputs	25.00%
Minimum [Member] | Prepayment speeds [Member]
Fair Value Measurements [Line Items]
Range of Inputs	6.00%
Minimum [Member] | Discount rate [Member]
Fair Value Measurements [Line Items]
Range of Inputs	3.90%
Maximum [Member] | Discount for date appraisal [Member]
Fair Value Measurements [Line Items]
Range of Inputs	30.00%
Maximum [Member] | Discount for costs to sell [Member]
Fair Value Measurements [Line Items]
Range of Inputs	8.00%
Maximum [Member] | Discount for appraisal type [Member]
Fair Value Measurements [Line Items]
Range of Inputs	30.00%
Maximum [Member] | Prepayment speeds [Member]
Fair Value Measurements [Line Items]
Range of Inputs	25.60%
Maximum [Member] | Discount rate [Member]
Fair Value Measurements [Line Items]
Range of Inputs	6.70%