Fair Values Of Assets And Liabilities (Summary Of Assets Measured At Fair Value On A Nonrecurring Basis) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013		Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale, at lower of cost or market	$ 334,300		$ 334,300
Fair Value Losses Recognized, Impaired loans—collateral based	8,380		24,430
Fair Value Losses Recognized, Other real estate owned	2,269	[1]	8,403	[1]
Fair Value Losses Recognized, Mortgage loans held-for-sale, at lower of cost or market	0		0
Fair Value Losses Recognized, Total	10,649		32,833
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	97,093		97,093
Other real estate owned	142,287		142,287
Mortgage loans held-for-sale, at lower of cost or market	5,159		5,159
Total	244,539		244,539
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	0		0
Other real estate owned	0		0
Mortgage loans held-for-sale, at lower of cost or market	0		0
Total	0		0
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	0		0
Other real estate owned	0		0
Mortgage loans held-for-sale, at lower of cost or market	5,159		5,159
Total	5,159		5,159
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	97,093		97,093
Other real estate owned	142,287		142,287
Mortgage loans held-for-sale, at lower of cost or market	0		0
Total	$ 239,380		$ 239,380

[1] Fair value losses recognized on other real estate owned include valuation adjustments and charge-offs during the respective period.