COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 4) (Covered loans, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Carrying Amounts And Composition Of Covered Loans
Total principal balance	$ 1,789,139	[1]	$ 2,461,560	[2]
Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	1,550,717		2,003,632
Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	27,259		43,604
Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	211,163		406,855
Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			7,469
Residential
Carrying Amounts And Composition Of Covered Loans
Total principal balance	579,828		693,603
Residential | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	537,818		654,270
Residential | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	555		1,518
Residential | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	41,455		37,815
Residential | Residential Single-family
Carrying Amounts And Composition Of Covered Loans
Total principal balance	248,377		290,095
Residential | Residential Single-family | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	240,954		281,246
Residential | Residential Single-family | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	555		733
Residential | Residential Single-family | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	6,868		8,116
Residential | Residential Multifamily
Carrying Amounts And Composition Of Covered Loans
Total principal balance	331,451		403,508
Residential | Residential Multifamily | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	296,864		373,024
Residential | Residential Multifamily | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance			785
Residential | Residential Multifamily | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	34,587		29,699
Commercial Real Estate ("CRE")
Carrying Amounts And Composition Of Covered Loans
Total principal balance	836,789		1,267,363
Commercial Real Estate ("CRE") | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	681,895		899,223
Commercial Real Estate ("CRE") | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	12,847		37,323
Commercial Real Estate ("CRE") | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	142,047		323,451
Commercial Real Estate ("CRE") | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			7,366
Commercial Real Estate ("CRE") | Commercial and Industrial Real Estate
Carrying Amounts And Composition Of Covered Loans
Total principal balance	773,098		1,103,530
Commercial Real Estate ("CRE") | Commercial and Industrial Real Estate | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	658,095		857,376
Commercial Real Estate ("CRE") | Commercial and Industrial Real Estate | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	2,790		27,851
Commercial Real Estate ("CRE") | Commercial and Industrial Real Estate | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	112,213		211,835
Commercial Real Estate ("CRE") | Commercial and Industrial Real Estate | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			6,468
Commercial Real Estate ("CRE") | Construction and Land
Carrying Amounts And Composition Of Covered Loans
Total principal balance	63,691		163,833
Commercial Real Estate ("CRE") | Construction and Land | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	23,800		41,847
Commercial Real Estate ("CRE") | Construction and Land | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	10,057		9,472
Commercial Real Estate ("CRE") | Construction and Land | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	29,834		111,616
Commercial Real Estate ("CRE") | Construction and Land | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			898
Other Loans
Carrying Amounts And Composition Of Covered Loans
Total principal balance	372,522		500,594
Other Loans | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	331,004		450,139
Other Loans | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	13,857		4,763
Other Loans | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	27,661		45,589
Other Loans | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			103
Other Loans | Commercial Business
Carrying Amounts And Composition Of Covered Loans
Total principal balance	307,147		426,621
Other Loans | Commercial Business | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	267,073		378,086
Other Loans | Commercial Business | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	13,613		4,635
Other Loans | Commercial Business | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	26,461		43,797
Other Loans | Commercial Business | Doubtful
Carrying Amounts And Composition Of Covered Loans
Total principal balance			103
Other Loans | Other Consumer
Carrying Amounts And Composition Of Covered Loans
Total principal balance	65,375		73,973
Other Loans | Other Consumer | Pass/Watch
Carrying Amounts And Composition Of Covered Loans
Total principal balance	63,931		72,053
Other Loans | Other Consumer | Special Mention
Carrying Amounts And Composition Of Covered Loans
Total principal balance	244		128
Other Loans | Other Consumer | Substandard
Carrying Amounts And Composition Of Covered Loans
Total principal balance	$ 1,200		$ 1,792

[1] Includes $290.4 million of covered advances comprised of $191.1 million, $59.6 million, $27.6 million and $12.1 million of commercial and industrial, commercial real estate, consumer, and residential loans, respectively.

[2] Includes $320.2 million of covered advances comprised of $230.6 million, $46.7 million, $30.9 million and $12.0 million of commercial and industrial, commercial real estate, consumer and residential loans, respectively.