LOANS (covered) - Investment in Covered Impaired Loans, excluding Loans Accounted for under FASB ASC Topic 310-30 (Detail) (Loans with no related allowance recorded [member], Covered Loans [Member], Loans Excluded from FASB ASC Topic 310-30, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 6,285	$ 6,285	$ 11,160
Unpaid Principal Balance	11,390	11,390	17,050
Related Allowance	0	0	0
Average Recorded Investment		8,622	13,945
Interest Income Recognized	13	61	58
Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,199	3,199	7,203
Unpaid Principal Balance	5,532	5,532	10,152
Related Allowance	0	0	0
Average Recorded Investment		5,228	9,873
Interest Income Recognized	8	51	47
Real estate-commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,523	1,523	2,192
Unpaid Principal Balance	3,424	3,424	4,002
Related Allowance	0	0	0
Average Recorded Investment		2,064	2,504
Interest Income Recognized	5	9	5
Home equity
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,548	1,548	18
Unpaid Principal Balance	2,419	2,419	18
Related Allowance	0	0	0
Average Recorded Investment		1,314	9
Interest Income Recognized	0	1	0
All other
Financing Receivable, Impaired [Line Items]
Recorded Investment	15	15
Unpaid Principal Balance	15	15
Related Allowance	0	0
Average Recorded Investment		16
Interest Income Recognized	0	0
Installment
Financing Receivable, Impaired [Line Items]
Recorded Investment			1,747
Unpaid Principal Balance			2,878
Related Allowance			0
Average Recorded Investment			1,559
Interest Income Recognized			$ 6