NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 11) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Non-covered loans
Impaired loans disclosures
Unpaid principal balance	$ 201,021,000				$ 201,021,000				$ 212,637,000
Recorded Investment With No Allowance	97,573,000				97,573,000				110,004,000
Recorded Investment With Allowance	79,139,000				79,139,000				73,473,000
Recorded investment	176,712,000	[1]			176,712,000	[1]			183,477,000	[1]
Related allowance	26,958,000				26,958,000				24,143,000
Average recorded investment	178,116,000		182,828,000		179,411,000		192,265,000
Interest income recognized (accrual basis)	835,000	[2]	1,002,000	[2]	2,622,000	[2]	3,874,000	[2]
Covered loans accounted for under ASC 310-10
Impaired loans disclosures
Covered nonaccrual loans	9,200,000				9,200,000				17,700,000
Residential | Single-family | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	20,954,000				20,954,000				15,814,000
Recorded Investment With No Allowance	12,697,000				12,697,000				13,585,000
Recorded Investment With Allowance	6,911,000				6,911,000				1,588,000
Recorded investment	19,608,000	[1]			19,608,000	[1]			15,173,000	[1]
Related allowance	413,000				413,000				207,000
Average recorded investment	19,668,000		13,131,000		19,372,000		13,464,000
Interest income recognized (accrual basis)	87,000	[2]	37,000	[2]	263,000	[2]	117,000	[2]
Residential | Multifamily | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	37,873,000				37,873,000				43,821,000
Recorded Investment With No Allowance	20,610,000				20,610,000				30,899,000
Recorded Investment With Allowance	14,899,000				14,899,000				10,215,000
Recorded investment	35,509,000	[1]			35,509,000	[1]			41,114,000	[1]
Related allowance	1,467,000				1,467,000				1,339,000
Average recorded investment	35,547,000		43,452,000		35,610,000		43,465,000
Interest income recognized (accrual basis)	177,000	[2]	224,000	[2]	529,000	[2]	680,000	[2]
Commercial Real Estate ("CRE") | Income producing | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	70,152,000				70,152,000				73,777,000
Recorded Investment With No Allowance	45,456,000				45,456,000				39,745,000
Recorded Investment With Allowance	16,496,000				16,496,000				25,523,000
Recorded investment	61,952,000	[1]			61,952,000	[1]			65,268,000	[1]
Related allowance	2,349,000				2,349,000				5,976,000
Average recorded investment	62,973,000		64,130,000		64,820,000		68,336,000
Interest income recognized (accrual basis)	273,000	[2]	406,000	[2]	940,000	[2]	2,113,000	[2]
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	13,334,000				13,334,000				17,390,000
Recorded Investment With No Allowance	2,860,000				2,860,000				4,372,000
Recorded Investment With Allowance	5,649,000				5,649,000				7,908,000
Recorded investment	8,509,000	[1]			8,509,000	[1]			12,280,000	[1]
Related allowance	1,931,000				1,931,000				2,082,000
Average recorded investment	8,581,000		12,943,000		8,676,000		13,049,000
Interest income recognized (accrual basis)	75,000	[2]	124,000	[2]	224,000	[2]	371,000	[2]
Commercial and Industrial ("C&I") | Commercial Business | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	50,191,000				50,191,000				48,482,000
Recorded Investment With No Allowance	7,909,000				7,909,000				10,850,000
Recorded Investment With Allowance	34,713,000				34,713,000				27,487,000
Recorded investment	42,622,000	[1]			42,622,000	[1]			38,337,000	[1]
Related allowance	20,750,000				20,750,000				13,787,000
Average recorded investment	42,832,000		38,604,000		42,403,000		42,612,000
Interest income recognized (accrual basis)	207,000	[2]	200,000	[2]	619,000	[2]	564,000	[2]
Commercial and Industrial ("C&I") | Trade finance | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	368,000				368,000				2,771,000
Recorded Investment With No Allowance									438,000
Recorded Investment With Allowance	363,000				363,000				752,000
Recorded investment	363,000	[1]			363,000	[1]			1,190,000	[1]
Related allowance	47,000				47,000				752,000
Average recorded investment	363,000		1,088,000		383,000		2,029,000
Interest income recognized (accrual basis)	4,000	[2]	4,000	[2]	12,000	[2]	8,000	[2]
Consumer | Other Consumer | Non-covered loans
Impaired loans disclosures
Unpaid principal balance	1,261,000				1,261,000				1,945,000
Recorded Investment With No Allowance	1,153,000				1,153,000				1,546,000
Recorded Investment With Allowance	108,000				108,000
Recorded investment	1,261,000	[1]			1,261,000	[1]			1,546,000	[1]
Related allowance	1,000				1,000
Average recorded investment	1,264,000		1,516,000		1,259,000		1,553,000
Interest income recognized (accrual basis)	12,000	[2]	7,000	[2]	35,000	[2]	21,000	[2]
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]
Average recorded investment			$ 1,076,000				$ 869,000

[1] Excludes $9.2 million and $17.7 million of covered non-accrual loans at September 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.

[2] Includes interest recognized on accruing TDRs. Interest payments received on nonaccrual loans are generally reflected as a reduction of principal and not as interest income.