LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 4) - Loans Receivable - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Nonaccrual and Past Due Loans
Total loans	$ 24,236,216	$ 23,659,761
Number Of Days Beyond Loan Classified Nonaccrual	90 days
CRE
Nonaccrual and Past Due Loans
Total loans	$ 8,476,682	8,110,749
CRE | Income producing
Nonaccrual and Past Due Loans
Total loans	7,812,733	7,478,474
CRE | Construction
Nonaccrual and Past Due Loans
Total loans	522,967	438,671
CRE | Land
Nonaccrual and Past Due Loans
Total loans	140,982	193,604
C&I
Nonaccrual and Past Due Loans
Total loans	9,163,804	9,003,007
C&I | Commercial business
Nonaccrual and Past Due Loans
Total loans	8,449,136	8,213,897
C&I | Trade finance
Nonaccrual and Past Due Loans
Total loans	714,668	789,110
Residential
Nonaccrual and Past Due Loans
Total loans	4,532,300	4,589,914
Residential | Single-family
Nonaccrual and Past Due Loans
Total loans	3,186,031	3,066,919
Residential | Multifamily
Nonaccrual and Past Due Loans
Total loans	1,346,269	1,522,995
Consumer
Nonaccrual and Past Due Loans
Total loans	2,063,430	1,956,091
Non-PCI Loans
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	35,817	53,194
Total Nonaccrual Loans	171,580	121,369
Current Accruing Loans	23,234,776	22,514,444
Total loans	23,442,173	22,689,007
Non-PCI Loans | CRE
Nonaccrual and Past Due Loans
Total loans	8,025,630	7,561,384
Non-PCI Loans | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	6,549	28,721
Total Nonaccrual Loans	59,250	29,229
Current Accruing Loans	7,298,522	6,879,249
Total loans	7,364,321	6,937,199
Non-PCI Loans | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Total Nonaccrual Loans	0	14
Current Accruing Loans	522,967	436,762
Total loans	522,967	436,776
Non-PCI Loans | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	3,970	1,124
Total Nonaccrual Loans	5,789	683
Current Accruing Loans	128,583	185,602
Total loans	138,342	187,409
Non-PCI Loans | C&I
Nonaccrual and Past Due Loans
Total loans	9,117,182	8,943,791
Non-PCI Loans | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	4,881	3,177
Total Nonaccrual Loans	73,927	64,735
Current Accruing Loans	8,323,718	8,088,079
Total loans	8,402,526	8,155,991
Non-PCI Loans | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Total Nonaccrual Loans	8,439	0
Current Accruing Loans	706,217	787,800
Total loans	714,656	787,800
Non-PCI Loans | Residential
Nonaccrual and Past Due Loans
Total loans	4,257,575	4,252,004
Non-PCI Loans | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	8,302	10,584
Total Nonaccrual Loans	5,117	8,726
Current Accruing Loans	3,013,798	2,857,976
Total loans	3,027,217	2,877,286
Non-PCI Loans | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	4,665	7,301
Total Nonaccrual Loans	17,319	16,244
Current Accruing Loans	1,208,374	1,351,173
Total loans	1,230,358	1,374,718
Non-PCI Loans | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	7,450	2,287
Total Nonaccrual Loans	1,739	1,738
Current Accruing Loans	2,032,597	1,927,803
Total loans	2,041,786	1,931,828
Non-PCI Loans | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	25,907	22,636
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	3,557	3,465
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	3,340	1,124
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	4,455	1,992
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	5,038	7,657
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	4,328	6,320
Non-PCI Loans | Accruing Loans 30-59 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	5,189	2,078
Non-PCI Loans | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	9,910	30,558
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	2,992	25,256
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	630	0
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	426	1,185
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	3,264	2,927
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	337	981
Non-PCI Loans | Accruing Loans 60-89 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	2,261	209
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	91,872	69,187
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	17,860	11,359
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	14
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	5,779	277
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	54,516	50,726
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	4,734	0
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	2,378	92
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	6,474	6,486
Non-PCI Loans | Nonaccrual Loans Less Than 90 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	131	233
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	79,708	52,182
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	41,390	17,870
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	0
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	10	406
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	19,411	14,009
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	3,705	0
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	2,739	8,634
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	10,845	9,758
Non-PCI Loans | Nonaccrual Loans 90 or More Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	$ 1,608	$ 1,505