Additional Disclosures on Cash Flow Information and Non-Cash Activities (Detail) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Non-cash activities:
Loans transferred to other real estate	$ 96,481		$ 77,919
Loans transferred to other property	14,299		19,968
Total loans transferred to foreclosed assets	110,780		97,887
Transfers from loans held-in-portfolio to loans held-for-sale	18,061		23,159
Transfers from loans held-for-sale to loans held-in-portfolio	26,873		6,292
Loans securitized into investment securities	594,117	[1]	411,063	[1]
Recognition of mortgage servicing rights on securitizations or asset transfers	11,292		7,809
Conversion of preferred stock to common stock:
Preferred stock converted			(1,150,000)
Common stock issued			$ 1,341,667

[1] Includes loans securitized into trading securities and subsequently sold before quarter end.