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NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 13) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | $ 234,535 |  | $ 216,523 |  | $ 216,523 |
Provision for loan losses | 4,327 |  | 18,100 |  | 65,184 |
Allowance for unfunded loan commitments and letters of credit | 716 |  |  |  | 1,563 |
Charge-offs | (3,055) |  |  |  | (64,912) |
Recoveries | 2,383 |  |  |  | 16,177 |
Net charge-offs | (672) |  | (10,300) |  | (48,735) |
Ending balance | 238,906 |  |  |  | 234,535 |
Ending balance allocated to: |  |  |  |  |  |
Loans individually evaluated for impairment | 12,633 |  |  |  | 11,527 |
Loans collectively evaluated for impairment | 224,281 |  |  |  | 223,008 |
Covered loans acquired with deteriorated credit quality | 1,992 | [1] |  |  |  |
Ending balance | 238,906 |  |  |  | 234,535 |
Residential |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | 49,349 |  | 52,180 |  | 52,180 |
Provision for loan losses | (2,926) |  |  |  | 3,255 |
Charge-offs | (311) |  |  |  | (7,700) |
Recoveries | 768 |  |  |  | 1,614 |
Net charge-offs | 457 |  |  |  | (6,086) |
Ending balance | 46,880 |  |  |  | 49,349 |
Ending balance allocated to: |  |  |  |  |  |
Loans individually evaluated for impairment | 1,037 |  |  |  | 3,131 |
Loans collectively evaluated for impairment | 45,843 |  |  |  | 46,218 |
Ending balance | 46,880 |  |  |  | 49,349 |
Commercial Real Estate ("CRE") |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | 69,856 |  | 66,457 |  | 66,457 |
Provision for loan losses | 3,818 |  |  |  | 20,977 |
Charge-offs | (1,005) |  |  |  | (27,060) |
Recoveries | 289 |  |  |  | 9,482 |
Net charge-offs | (716) |  |  |  | (17,578) |
Ending balance | 72,958 |  |  |  | 69,856 |
Ending balance allocated to: |  |  |  |  |  |
Loans individually evaluated for impairment | 6,858 |  |  |  | 5,561 |
Loans collectively evaluated for impairment | 66,100 |  |  |  | 64,295 |
Ending balance | 72,958 |  |  |  | 69,856 |
Commercial and Industrial ("C&I") |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | 105,376 |  | 87,020 |  | 87,020 |
Provision for loan losses | (2,300) |  |  |  | 35,204 |
Charge-offs | (1,261) |  |  |  | (21,818) |
Recoveries | 531 |  |  |  | 4,970 |
Net charge-offs | (730) |  |  |  | (16,848) |
Ending balance | 102,346 |  |  |  | 105,376 |
Ending balance allocated to: |  |  |  |  |  |
Loans individually evaluated for impairment | 4,734 |  |  |  | 2,835 |
Loans collectively evaluated for impairment | 97,612 |  |  |  | 102,541 |
Ending balance | 102,346 |  |  |  | 105,376 |
Consumer |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | 4,801 |  | 4,219 |  | 4,219 |
Provision for loan losses | 1,362 |  |  |  | 2,295 |
Charge-offs | (346) |  |  |  | (1,824) |
Recoveries | 795 |  |  |  | 111 |
Net charge-offs | 449 |  |  |  | (1,713) |
Ending balance | 6,612 |  |  |  | 4,801 |
Ending balance allocated to: |  |  |  |  |  |
Loans individually evaluated for impairment | 4 |  |  |  |  |
Loans collectively evaluated for impairment | 6,608 |  |  |  | 4,801 |
Ending balance | 6,612 |  |  |  | 4,801 |
Covered Loans under ASC 310-10 Subject to Allowance for Loan Losses |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Beginning balance | 5,153 | [2] | 6,647 | [2] | 6,647 | [2]
Provision for loan losses | 3,097 | [2] |  |  | 5,016 | [2]
Charge-offs | (132) | [2] |  |  | (6,510) | [2]
Net charge-offs | (132) | [2] |  |  | (6,510) | [2]
Ending balance | 8,118 | [2] |  |  | 5,153 | [2]
Ending balance allocated to: |  |  |  |  |  |
Loans collectively evaluated for impairment | 8,118 | [2] |  |  | 5,153 | [2]
Ending balance | 8,118 | [2] |  |  | 5,153 | [2]
Covered Loans under ASC 310-30 Subject to Allowance for Loan Losses |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Provision for loan losses | 1,992 |  |  |  |  |
Ending balance | 1,992 |  |  |  |  |
Ending balance allocated to: |  |  |  |  |  |
Covered loans acquired with deteriorated credit quality | 1,992 | [1] |  |  |  |
Ending balance | 1,992 |  |  |  |  |
Unallocated |  |  |  |  |  |
Financing Receivable Allowance for Credit Losses Roll Forward |  |  |  |  |  |
Provision for loan losses | (716) |  |  |  | (1,563) |
Allowance for unfunded loan commitments and letters of credit | $ 716 |  |  |  | $ 1,563 |
[1] | The Company has elected to account for covered loans acquired in the FDIC-assisted acquisitions under ASC 310-30, excluding any additional advances subsequent to acquisition date.
[2] | This allowance is related to drawdowns on commitments that were in existence as of the acquisition dates of WFIB and UCB and, therefore, are covered under the shared-loss agreements with the FDIC. Allowance on these subsequent drawdownsis accounted for as part of the allowance for loan losses.

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- Definition Reflects the amount charged against earnings during the period as credit losses (bad debt expense) for unfunded loan commitments and letters of credit during the period. + References No definition available. + Details
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- Definition Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reflects the amount charged against earnings during the period as bad debt expense, net of recoveries of previously expensed credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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