FAIR VALUE MEASUREMENTS (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Total gain (loss) on assets measured on a nonrecurring basis	$ (9,498)	$ (36,450)	$ (43,332)
Non-Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Total gain (loss) on assets measured on a nonrecurring basis	(2,824)	(4,381)	(8,915)
Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Total gain (loss) on assets measured on a nonrecurring basis	(1,096)	(9,275)	(3,982)
Non-covered impaired loans
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Total gain (loss) on assets measured on a nonrecurring basis	(5,582)	(22,796)	(30,639)
SBA loan servicing asset
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Total gain (loss) on assets measured on a nonrecurring basis	4	2	204
Nonrecurring basis | Total
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	116,045	189,203
Nonrecurring basis | Total | Non-Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	7,945	44,106
Nonrecurring basis | Total | Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	4,893	29,490
Nonrecurring basis | Total | Non-covered impaired loans
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	102,207	114,353
Nonrecurring basis | Total | SBA loan servicing asset
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	1,000	1,254
Nonrecurring basis | Level 2
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	7,574	42,211
Nonrecurring basis | Level 2 | Non-Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value		3,679
Nonrecurring basis | Level 2 | Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	2,599	24,729
Nonrecurring basis | Level 2 | Non-covered impaired loans
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	4,975	13,803
Nonrecurring basis | Level 3
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	108,471	146,992
Nonrecurring basis | Level 3 | Non-Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	7,945	40,427
Nonrecurring basis | Level 3 | Covered other real estate owned
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	2,294	4,761
Nonrecurring basis | Level 3 | Non-covered impaired loans
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	97,232	100,550
Nonrecurring basis | Level 3 | SBA loan servicing asset
Assets measured and recorded at fair value on a recurring and nonrecurring basis
Assets at fair value	$ 1,000	$ 1,254