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		6 Months Ended
	Jun. 30, 2013		Jun. 30, 2013
Mortgage loans held-for-sale, at lower of cost or market	$ 538,000		$ 538,000
Fair Value Losses Recognized, Impaired loans—collateral based	10,678		16,050
Fair Value Losses Recognized, Other real estate owned	5,379	[1]	8,338	[1]
Fair Value Losses Recognized, Mortgage loans held-for-sale, at lower of cost or market	0		0
Fair Value Losses Recognized, Total	16,057		24,388
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans - collateral based	104,000		104,000
Mortgage loans held-for-sale, at lower of cost or market	12,964		12,964
Total	174,039		174,039
Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
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
Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans - collateral based	0		0
Other real estate owned	0		0
Mortgage loans held-for-sale, at lower of cost or market	12,964		12,964
Total	12,964		12,964
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans - collateral based	104,050		104,050
Other real estate owned	57,025		57,025
Mortgage loans held-for-sale, at lower of cost or market	0		0
Total	$ 161,075		$ 161,075

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