NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 5) (Non-covered loans, USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Aging analysis of past Due non-covered loans and loans held for sale
Number of days a loan is past due and is placed on nonaccrual status	90 days
Accruing loans 30 - 59 days past due	$ 38,378	[1]	$ 30,282
Accruing loans 60 - 89 days past due	14,634	[1]	9,956
Total accruing past due loans	53,012	[1]	40,238
Nonaccrual loans less than 90 days past due	57,323	[1]	40,462
Nonaccrual loans 90 or more days past due	61,599	[1]	71,189
Total nonaccrual past due loans	118,922	[1]	111,651
Current Accruing loans	18,556,698	[1]	15,731,398
Total non-covered loans and loans held for sale, gross	18,728,632	[1]	15,883,287
Unearned fees, premiums and discounts, net	(5,589)		(23,672)
Recorded investment in non-covered loans and loans held for sale	18,723,043		15,859,615
Loans Held for Sale
Aging analysis of past Due non-covered loans and loans held for sale
Current Accruing loans	450,864		204,970
Total non-covered loans and loans held for sale, gross	450,864		204,970
Residential | Single-family
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	8,223		4,694
Accruing loans 60 - 89 days past due	743		922
Total accruing past due loans	8,966		5,616
Nonaccrual loans less than 90 days past due	2,844
Nonaccrual loans 90 or more days past due	5,637		11,218
Total nonaccrual past due loans	8,481		11,218
Current Accruing loans	3,299,134		3,176,041
Total non-covered loans and loans held for sale, gross	3,316,581		3,192,875
Residential | Multifamily
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	4,514		8,580
Accruing loans 60 - 89 days past due	932		531
Total accruing past due loans	5,446		9,111
Nonaccrual loans less than 90 days past due	14,385		19,661
Nonaccrual loans 90 or more days past due	11,113		7,972
Total nonaccrual past due loans	25,498		27,633
Current Accruing loans	1,102,202		955,690
Total non-covered loans and loans held for sale, gross	1,133,146		992,434
Commercial Real Estate ("CRE") | Income producing
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	18,072		12,746
Accruing loans 60 - 89 days past due	7,619		1,798
Total accruing past due loans	25,691		14,544
Nonaccrual loans less than 90 days past due	31,025		13,924
Nonaccrual loans 90 or more days past due	12,121		22,549
Total nonaccrual past due loans	43,146		36,473
Current Accruing loans	5,289,873		4,250,013
Total non-covered loans and loans held for sale, gross	5,358,710		4,301,030
Commercial Real Estate ("CRE") | Construction
Aging analysis of past Due non-covered loans and loans held for sale
Nonaccrual loans 90 or more days past due	6,888		6,888
Total nonaccrual past due loans	6,888		6,888
Current Accruing loans	226,217		133,298
Total non-covered loans and loans held for sale, gross	233,105		140,186
Commercial Real Estate ("CRE") | Land
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	2,125
Accruing loans 60 - 89 days past due	96
Total accruing past due loans	2,221
Nonaccrual loans less than 90 days past due	1,467		265
Nonaccrual loans 90 or more days past due	5,970		3,223
Total nonaccrual past due loans	7,437		3,488
Current Accruing loans	196,830		140,373
Total non-covered loans and loans held for sale, gross	206,488		143,861
Commercial and Industrial ("C&I") | Commercial Business
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	3,047		3,428
Accruing loans 60 - 89 days past due	4,590		6,259
Total accruing past due loans	7,637		9,687
Nonaccrual loans less than 90 days past due	7,600		6,437
Nonaccrual loans 90 or more days past due	16,151		15,486
Total nonaccrual past due loans	23,751		21,923
Current Accruing loans	5,925,219		4,605,446
Total non-covered loans and loans held for sale, gross	5,956,607		4,637,056
Commercial and Industrial ("C&I") | Trade finance
Aging analysis of past Due non-covered loans and loans held for sale
Nonaccrual loans 90 or more days past due	222		909
Total nonaccrual past due loans	222		909
Current Accruing loans	716,474		722,228
Total non-covered loans and loans held for sale, gross	716,696		723,137
Consumer | Student loans
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	599		541
Accruing loans 60 - 89 days past due	643		445
Total accruing past due loans	1,242		986
Nonaccrual loans 90 or more days past due	2,540		1,681
Total nonaccrual past due loans	2,540		1,681
Current Accruing loans	135,954		676,553
Total non-covered loans and loans held for sale, gross	139,736		679,220
Consumer | Other Consumer
Aging analysis of past Due non-covered loans and loans held for sale
Accruing loans 30 - 59 days past due	1,798		293
Accruing loans 60 - 89 days past due	11		1
Total accruing past due loans	1,809		294
Nonaccrual loans less than 90 days past due	2		175
Nonaccrual loans 90 or more days past due	957		1,263
Total nonaccrual past due loans	959		1,438
Current Accruing loans	1,213,931		866,786
Total non-covered loans and loans held for sale, gross	$ 1,216,699		$ 868,518

[1] Loans net of ASC 310-30 discount.