LOANS (covered) - Changes in Covered Other Real Estate Owned (Detail) (Covered Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	$ 41,489	$ 33,648	$ 44,818	$ 35,257
Additions	2,411	11,479	7,785	23,557
Disposals	15,365	5,989	20,913	17,591
Write-downs	3,127	2,451	6,282	4,536
Balance at end of period	25,408	36,687	25,408	36,687
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	2,349	10,535	5,099	21,732
Disposals	13,554	2,234	18,559	11,500
Write-downs	2,332	1,439	5,416	3,524
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	62	944	2,686	1,825
Disposals	1,811	3,755	2,354	6,091
Write-downs	$ 795	$ 1,012	$ 866	$ 1,012