COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Carrying Amounts And Composition Of Covered Loans
Total principal balance	$ 2,461,560	$ 3,450,956
Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	2,003,632	2,569,918
Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	43,604	58,016
Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	406,855	814,814
Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	7,469	8,208
Real Estate Loans
Carrying Amounts And Composition Of Covered Loans
Total principal balance	1,960,966	2,775,972
Real Estate Loans | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	1,553,493	2,050,246
Real Estate Loans | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	38,841	34,968
Real Estate Loans | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	361,266	682,745
Real Estate Loans | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	7,366	8,013
Real Estate Loans | Residential Single-family
Carrying Amounts And Composition Of Covered Loans
Total principal balance	290,095	362,345
Real Estate Loans | Residential Single-family | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	281,246	345,568
Real Estate Loans | Residential Single-family | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	733	982
Real Estate Loans | Residential Single-family | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	8,116	15,795
Real Estate Loans | Residential Multifamily
Carrying Amounts And Composition Of Covered Loans
Total principal balance	403,508	647,440
Real Estate Loans | Residential Multifamily | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	373,024	571,061
Real Estate Loans | Residential Multifamily | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	785	8,074
Real Estate Loans | Residential Multifamily | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	29,699	68,305
Real Estate Loans | Commercial and Industrial Real Estate
Carrying Amounts And Composition Of Covered Loans
Total principal balance	1,103,530	1,348,556
Real Estate Loans | Commercial and Industrial Real Estate | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	857,376	963,069
Real Estate Loans | Commercial and Industrial Real Estate | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	27,851	10,777
Real Estate Loans | Commercial and Industrial Real Estate | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	211,835	367,869
Real Estate Loans | Commercial and Industrial Real Estate | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	6,468	6,841
Real Estate Loans | Construction and Land
Carrying Amounts And Composition Of Covered Loans
Total principal balance	163,833	417,631
Real Estate Loans | Construction and Land | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	41,847	170,548
Real Estate Loans | Construction and Land | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	9,472	15,135
Real Estate Loans | Construction and Land | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	111,616	230,776
Real Estate Loans | Construction and Land | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	898	1,172
Other Loans
Carrying Amounts And Composition Of Covered Loans
Total principal balance	500,594	674,984
Other Loans | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	450,139	519,672
Other Loans | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	4,763	23,048
Other Loans | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	45,589	132,069
Other Loans | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	103	195
Other Loans | Commercial Business
Carrying Amounts And Composition Of Covered Loans
Total principal balance	426,621	587,333
Other Loans | Commercial Business | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	378,086	434,138
Other Loans | Commercial Business | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	4,635	22,533
Other Loans | Commercial Business | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	43,797	130,467
Other Loans | Commercial Business | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance	103	195
Other Loans | Other Consumer
Carrying Amounts And Composition Of Covered Loans
Total principal balance	73,973	87,651
Other Loans | Other Consumer | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	72,053	85,534
Other Loans | Other Consumer | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	128	515
Other Loans | Other Consumer | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	$ 1,792	$ 1,602