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COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 4) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | $ 3,217,341 | $ 3,450,956
Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 2,424,681 | 2,569,918
Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 56,372 | 58,016
Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 728,194 | 814,814
Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 8,094 | 8,208
Real Estate Loans |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 2,594,243 | 2,775,972
Real Estate Loans | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 1,941,693 | 2,050,246
Real Estate Loans | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 31,300 | 34,968
Real Estate Loans | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 613,351 | 682,745
Real Estate Loans | Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 7,899 | 8,013
Real Estate Loans | Residential Single-family |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 341,946 | 362,345
Real Estate Loans | Residential Single-family | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 325,397 | 345,568
Real Estate Loans | Residential Single-family | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 903 | 982
Real Estate Loans | Residential Single-family | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 15,646 | 15,795
Real Estate Loans | Residential Multifamily |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 587,409 | 647,440
Real Estate Loans | Residential Multifamily | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 526,181 | 571,061
Real Estate Loans | Residential Multifamily | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 6,262 | 8,074
Real Estate Loans | Residential Multifamily | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 54,966 | 68,305
Real Estate Loans | Commercial and Industrial Real Estate |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 1,279,779 | 1,348,556
Real Estate Loans | Commercial and Industrial Real Estate | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 934,102 | 963,069
Real Estate Loans | Commercial and Industrial Real Estate | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 9,343 | 10,777
Real Estate Loans | Commercial and Industrial Real Estate | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 329,607 | 367,869
Real Estate Loans | Commercial and Industrial Real Estate | Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 6,727 | 6,841
Real Estate Loans | Construction and Land |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 385,109 | 417,631
Real Estate Loans | Construction and Land | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 156,013 | 170,548
Real Estate Loans | Construction and Land | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 14,792 | 15,135
Real Estate Loans | Construction and Land | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 213,132 | 230,776
Real Estate Loans | Construction and Land | Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 1,172 | 1,172
Other Loans |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 623,098 | 674,984
Other Loans | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 482,988 | 519,672
Other Loans | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 25,072 | 23,048
Other Loans | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 114,843 | 132,069
Other Loans | Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 195 | 195
Other Loans | Commercial Business |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 539,481 | 587,333
Other Loans | Commercial Business | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 401,191 | 434,138
Other Loans | Commercial Business | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 24,793 | 22,533
Other Loans | Commercial Business | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 113,302 | 130,467
Other Loans | Commercial Business | Doubtful |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 195 | 195
Other Loans | Other Consumer |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 83,617 | 87,651
Other Loans | Other Consumer | Pass/Watch |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 81,797 | 85,534
Other Loans | Other Consumer | Special Mention |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | 279 | 515
Other Loans | Other Consumer | Substandard |  |
Carrying Amounts And Composition Of Covered Loans |  |
Total principal balance | $ 1,541 | $ 1,602

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