NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 11) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Non-covered loans
Impaired loans disclosures
Unpaid principal balance	$ 200,466,000			$ 200,466,000			$ 212,637,000
Recorded Investment With No Allowance	103,303,000			103,303,000			110,004,000
Recorded Investment With Allowance	65,661,000			65,661,000			73,473,000
Recorded investment	168,964,000	[1]		168,964,000	[1]		183,477,000	[1]
Related allowance	24,841,000			24,841,000			24,143,000
Average recorded investment	172,844,000		160,728,000	173,828,000		163,339,000
Interest income recognized (accrual basis)	855,000		2,008,000	1,687,000		2,643,000
Covered loans accounted for under ASC 310-10
Impaired loans disclosures
Covered nonaccrual loans	14,300,000			14,300,000			17,700,000
Residential | Single-family | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	16,220,000			16,220,000			15,814,000
Recorded Investment With No Allowance	13,427,000			13,427,000			13,585,000
Recorded Investment With Allowance	1,067,000			1,067,000			1,588,000
Recorded investment	14,494,000	[1]		14,494,000	[1]		15,173,000	[1]
Related allowance	192,000			192,000			207,000
Average recorded investment	15,131,000		11,219,000	14,034,000		11,497,000
Interest income recognized (accrual basis)	65,000		38,000	115,000		77,000
Residential | Multifamily | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	39,108,000			39,108,000			43,821,000
Recorded Investment With No Allowance	27,617,000			27,617,000			30,899,000
Recorded Investment With Allowance	9,139,000			9,139,000			10,215,000
Recorded investment	36,756,000	[1]		36,756,000	[1]		41,114,000	[1]
Related allowance	1,185,000			1,185,000			1,339,000
Average recorded investment	36,683,000		45,230,000	36,817,000		45,407,000
Interest income recognized (accrual basis)	184,000		247,000	360,000		456,000
Commercial Real Estate ("CRE") | Income producing | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	65,663,000			65,663,000			73,777,000
Recorded Investment With No Allowance	39,638,000			39,638,000			39,745,000
Recorded Investment With Allowance	18,135,000			18,135,000			25,523,000
Recorded investment	57,773,000	[1]		57,773,000	[1]		65,268,000	[1]
Related allowance	2,555,000			2,555,000			5,976,000
Average recorded investment	59,121,000		57,105,000	59,917,000		58,098,000
Interest income recognized (accrual basis)	303,000		1,529,000	627,000		1,738,000
Commercial Real Estate ("CRE") | Construction | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	6,888,000			6,888,000			6,888,000
Recorded Investment With No Allowance	6,888,000			6,888,000			6,888,000
Recorded investment	6,888,000	[1]		6,888,000	[1]		6,888,000	[1]
Average recorded investment	6,888,000		6,888,000	6,888,000		6,888,000
Commercial Real Estate ("CRE") | Land | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	17,059,000			17,059,000			17,390,000
Recorded Investment With No Allowance	4,217,000			4,217,000			4,372,000
Recorded Investment With Allowance	7,865,000			7,865,000			7,908,000
Recorded investment	12,082,000	[1]		12,082,000	[1]		12,280,000	[1]
Related allowance	1,991,000			1,991,000			2,082,000
Average recorded investment	12,128,000		13,231,000	12,179,000		13,285,000
Interest income recognized (accrual basis)	75,000		124,000	149,000		247,000
Commercial and Industrial ("C&I") | Commercial Business | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	54,236,000			54,236,000			48,482,000
Recorded Investment With No Allowance	10,497,000			10,497,000			10,850,000
Recorded Investment With Allowance	29,182,000			29,182,000			27,487,000
Recorded investment	39,679,000	[1]		39,679,000	[1]		38,337,000	[1]
Related allowance	18,645,000			18,645,000			13,787,000
Average recorded investment	41,592,000		23,448,000	42,682,000		24,200,000
Interest income recognized (accrual basis)	211,000		59,000	414,000		104,000
Commercial and Industrial ("C&I") | Trade finance | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	529,000			529,000			2,771,000
Recorded Investment With No Allowance	256,000			256,000			438,000
Recorded Investment With Allowance	273,000			273,000			752,000
Recorded investment	529,000	[1]		529,000	[1]		1,190,000	[1]
Related allowance	273,000			273,000			752,000
Average recorded investment	546,000		2,052,000	559,000		2,367,000
Interest income recognized (accrual basis)	4,000		4,000	8,000		7,000
Consumer | Other Consumer | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	763,000			763,000			1,945,000
Recorded Investment With No Allowance	763,000			763,000			1,546,000
Recorded investment	763,000	[1]		763,000	[1]		1,546,000	[1]
Average recorded investment	755,000		1,555,000	752,000		1,597,000
Interest income recognized (accrual basis)	13,000		7,000	14,000		14,000
Consumer | Student loans | Non-covered loans
Impaired loans disclosures
Unpaid principal balance							1,749,000
Recorded Investment With No Allowance							1,681,000
Recorded investment							$ 1,681,000	[1]

[1] Excludes $14.3 million and $17.7 million of covered non-accrual loans at June 30, 2014 and December 31, 2013, respectively, accounted for under ASC 310-10, of which some loans have additional partial balances accounted for under ASC 310-30.