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COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 5) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Covered Nonperforming Assets |  |  |  |  |
Covered nonaccrual loans | $ 126,895,000 | [1],[2],[3] | $ 204,310,000 | [1],[2],[3] |
Total nonperforming loans | 126,895,000 |  | 204,310,000 |  |
Other real estate owned covered, net | 21,373,000 |  | 26,808,000 |  |
Total covered nonperforming assets | 148,268,000 |  | 231,118,000 |  |
Percentage of any reimbursable expense recorded as interest income under ASC 310-30 | 80.00% |  |  |  |
Covered TDR activity |  |  |  |  |
Balance at beginning of period | 157,736,000 |  | 146,709,000 |  |
Additions | 35,865,000 |  | 72,917,000 |  |
Transfers to OREO |  |  | (6,351,000) |  |
Charge-offs | (10,167,000) |  | (8,658,000) |  |
Paydowns/ Reductions | (67,427,000) |  | (46,881,000) |  |
Balance at end of period | 116,007,000 |  | 157,736,000 |  | 146,709,000
Changes in the accretable yield for the covered loans |  |  |  |  |
Balance at beginning of period | 556,986,000 |  | 785,165,000 |  |
Accretion | (347,010,000) |  | (382,132,000) |  |
Changes in expected cash flows | 251,569,000 |  | 153,953,000 |  |
Balance at end of period | 461,545,000 |  | 556,986,000 |  | 785,165,000
Covered assets - other disclosures |  |  |  |  |
Amount reclassified from nonaccretable yield to accretable yield due to changes in loss rate assumptions | 190,300,000 |  | 38,600,000 |  |
Amount of loans removed from the covered loans accounted for under ASC 310-30, excluding scheduled principal payments | 739,300,000 |  | 924,700,000 |  | 932,200,000
Loan discount related to payoffs and removals of loans | 168,100,000 |  | 124,700,000 |  | 102,100,000
Covered loans accounted for under ASC 310-10 |  |  |  |  |
Covered Nonperforming Assets |  |  |  |  |
Covered nonaccrual loans | 17,700,000 |  | 29,600,000 |  |
Covered OREO Properties |  |  |  |  |
Covered Nonperforming Assets |  |  |  |  |
Aggregate carrying value of covered OREO properties | 21,400,000 |  | 26,800,000 |  |
Number of covered OREO properties added during the period | 26 |  |  |  |
Aggregate carrying value of covered OREO properties added during the period | 31,200,000 |  |  |  |
Net adjustments included in aggregate carrying value on covered OREO properties | 2,400,000 |  |  |  |
Number of covered OREO properties sold during the period | 46 |  |  |  |
Total proceeds value of covered OREO properties sold during the period | 38,900,000 |  |  |  |
Total net gains (losses) on covered OREO properties sold during the period | $ 4,700,000 |  |  |  |
Covered OREO Properties | Geographic Concentration | California |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 31.00% |  |  |  |
Covered OREO Properties | Geographic Concentration | Massachusetts |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 31.00% |  |  |  |
United Commercial Bank (UCB) |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 94.00% |  |  |  |
Number of general geographic regions | 3 |  |  |  |
United Commercial Bank (UCB) | Geographic Concentration | California |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 64.00% |  |  |  |
United Commercial Bank (UCB) | Geographic Concentration | New York |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 11.00% |  |  |  |
United Commercial Bank (UCB) | Geographic Concentration | Hong Kong |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |
Percent of total | 10.00% |  |  |  |
[1] | Includes $17.7 million and $29.6 million of loans at December 31, 2013 and 2012, respectively, accounted for under ASC 310-10, of which some loans have additional partial balances accounted for under ASC 310-30.
[2] | Covered nonaccrual loans include loans that meet the criteria for nonaccrual but have a yield accreted through interest income under ASC 310-30 and all losses on covered loans are 80% reimbursed by the FDIC.
[3] | Represents principal balance net of discount.

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