LOANS (covered) - Covered Loan Delinquency, Excluding Loans Accounted for Under FASB ASC Topic 310-30 (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	$ 10,783	$ 13,724
60 - 89 days past due	3,853	5,591
> 90 days past due	19,742	27,862
Total Past due	34,378	47,177
Current	4,415,594	3,458,464
> 90 days past due and still accruing	249	218
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	2,063	2,016
60 - 89 days past due	333	161
> 90 days past due	1,727	7,136
Total Past due	4,123	9,313
Current	1,300,659	1,026,355
> 90 days past due and still accruing	0	0
Real estate-commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	5,697	7,800
60 - 89 days past due	2,359	4,269
> 90 days past due	12,144	12,732
Total Past due	20,200	24,801
Current	1,931,855	1,472,186
> 90 days past due and still accruing	0	0
Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	106	213
60 - 89 days past due	82	40
> 90 days past due	223	379
Total Past due	411	632
Current	47,150	46,501
> 90 days past due and still accruing	0	0
All other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	490	680
60 - 89 days past due	215	144
> 90 days past due	249	218
Total Past due	954	1,042
Current	108,187	114,685
> 90 days past due and still accruing	249	218
Covered Loans | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	384	492
60 - 89 days past due	196	375
> 90 days past due	3,996	3,478
Total Past due	4,576	4,345
Current	48,404	53,873
Total	52,980	58,218
> 90 days past due and still accruing	3	0
Covered Loans | Commercial | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	0	60
60 - 89 days past due	49	335
> 90 days past due	656	483
Total Past due	705	878
Current	636	266
Total	1,341	1,144
> 90 days past due and still accruing	0	0
Covered Loans | Real estate-commercial | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	0	184
60 - 89 days past due	144	0
> 90 days past due	251	1,263
Total Past due	395	1,447
Current	4,900	4,040
Total	5,295	5,487
> 90 days past due and still accruing	0	0
Covered Loans | Installment | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	0	0
60 - 89 days past due	0	0
> 90 days past due	0	5
Total Past due	0	5
Current	497	563
Total	497	568
> 90 days past due and still accruing	0	0
Covered Loans | Home equity | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	361	239
60 - 89 days past due	0	36
> 90 days past due	3,086	1,727
Total Past due	3,447	2,002
Current	40,283	46,647
Total	43,730	48,649
> 90 days past due and still accruing	0	0
Covered Loans | All other | Loans Excluded from FASB ASC Topic 310-30
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	23	9
60 - 89 days past due	3	4
> 90 days past due	3	0
Total Past due	29	13
Current	2,088	2,357
Total	2,117	2,370
> 90 days past due and still accruing	$ 3	$ 0