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NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES, Credit Quality Indicator (Details) (USD $) | Sep. 30, 2011 | Dec. 31, 2010
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Credit Quality Indicators [Abstract] |  |
Number of grades in the risk rating system utilized by the company to rate credit risk of loans receivable | 8 |
Maximum term for a loan to stay graded as Special Mention (in months) | 6M |
Decrease in non-covered loans graded Substandard and Doubtful | $ 133,500,000 |
Percentage decrease in non-covered loans graded Substandard and Doubtful (in hundredths) | 19.00% |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 9,807,250,000 | 8,717,388,000
Residential [Member] | Single-family [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,483,509,000 | 1,076,281,000
Residential [Member] | Multifamily [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 811,509,000 | 789,631,000
Commercial Real Estate [Member] | Income Producing [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 3,175,101,000 | 3,054,197,000
Commercial Real Estate [Member] | Construction [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 134,865,000 | 202,385,000
Commercial Real Estate [Member] | Land CRE [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 117,471,000 | 146,499,000
Commercial and Industrial [Member] | Commercial Business [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,421,858,000 | 1,553,218,000
Commercial and Industrial [Member] | Trade Finance [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 447,734,000 | 296,430,000
Consumer [Member] | Student Loans [Member] | Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 243,292,000 | 490,314,000
Consumer [Member] | Pass/Watch [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 255,864,000 | 238,964,000
Pass/Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 9,091,203,000 | 7,847,919,000
Residential [Member] | Single-family [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 11,780,000 | 12,376,000
Residential [Member] | Multifamily [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 20,815,000 | 42,887,000
Commercial Real Estate [Member] | Income Producing [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 81,370,000 | 80,714,000
Commercial Real Estate [Member] | Construction [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Commercial Real Estate [Member] | Land CRE [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 7,998,000 | 4,656,000
Commercial and Industrial [Member] | Commercial Business [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 32,461,000 | 34,449,000
Commercial and Industrial [Member] | Trade Finance [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 6,210,000 | 4,069,000
Consumer [Member] | Student Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Consumer [Member] | Special Mention [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 127,000 | 1,486,000
Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 160,761,000 | 180,637,000
Residential [Member] | Single-family [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 22,665,000 | 30,367,000
Residential [Member] | Multifamily [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 110,104,000 | 142,227,000
Commercial Real Estate [Member] | Income Producing [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 202,530,000 | 258,073,000
Commercial Real Estate [Member] | Construction [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 58,123,000 | 75,662,000
Commercial Real Estate [Member] | Land CRE [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 53,683,000 | 84,552,000
Commercial and Industrial [Member] | Commercial Business [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 87,162,000 | 81,185,000
Commercial and Industrial [Member] | Trade Finance [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 15,895,000 | 8,158,000
Consumer [Member] | Student Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Consumer [Member] | Substandard [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,292,000 | 2,762,000
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 554,454,000 | 682,986,000
Residential [Member] | Single-family [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Residential [Member] | Multifamily [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Commercial Real Estate [Member] | Income Producing [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Commercial Real Estate [Member] | Construction [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Commercial Real Estate [Member] | Land CRE [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Commercial and Industrial [Member] | Commercial Business [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 832,000 | 5,846,000
Commercial and Industrial [Member] | Trade Finance [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Consumer [Member] | Student Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Consumer [Member] | Doubtful [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 832,000 | 5,846,000
Residential [Member] | Single-family [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,517,954,000 | 1,119,024,000
Residential [Member] | Multifamily [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 942,428,000 | 974,745,000
Commercial Real Estate [Member] | Income Producing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 3,459,001,000 | 3,392,984,000
Commercial Real Estate [Member] | Construction [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 192,988,000 | 278,047,000
Commercial Real Estate [Member] | Land CRE [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 179,152,000 | 235,707,000
Commercial and Industrial [Member] | Commercial Business [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,542,313,000 | 1,674,698,000
Commercial and Industrial [Member] | Trade Finance [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 469,839,000 | 308,657,000
Consumer [Member] | Student Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 243,292,000 | 490,314,000
Consumer [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | $ 260,283,000 | $ 243,212,000

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- Definition The number of grades in the risk rating system utilized by the company to rate credit risk of loans receivable. Loans are risk rated based on analysis of the current state of the borrower's credit quality. Higher grades represent a higher level of credit risk. + Details
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- Definition The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Receivable -URI http://asc.fasb.org/extlink&oid=6953735 + Details
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