FAIR VALUE (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Non-covered impaired loans
Non-covered OREO	$ 29,300,000
Covered OREO	63,600,000
FDIC percentage of reimbursement under shared loss agreements	80.00%
Percentage of company's liability for losses under shared loss agreements	20.00%		20.00%
Company's liability for losses under shared loss agreements	5,300,000		8,800,000
Total eligible losses subject to shared loss agreements	26,300,000		44,000,000
Fair Value, Measurements, Nonrecurring | Fair Value Measurements
Non-covered impaired loans
Total residential	16,626,000		7,486,000
Total commercial real estate	45,679,000		39,325,000
Total commercial and industrial	12,516,000		6,405,000
Total consumer			538,000
Total non-covered impaired loans	74,821,000		53,754,000
Mortgage servicing assets (single-family, multifamily and commercial)	11,252,000		14,509,000
Non-covered OREO	8,491,000		12,940,000
Covered OREO	35,926,000	[1]	54,919,000	[1]
Loans Held for Sale	14,527,000		14,559,000
Investment in affordable housing partnerships	7,726,000
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Non-covered impaired loans
Total residential	16,626,000		7,486,000
Total commercial real estate	45,679,000		39,325,000
Total consumer			538,000
Total non-covered impaired loans	62,305,000		47,349,000
Non-covered OREO	8,491,000		12,940,000
Covered OREO	35,926,000	[1]	54,919,000	[1]
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Non-covered impaired loans
Total commercial and industrial	12,516,000		6,405,000
Total non-covered impaired loans	12,516,000		6,405,000
Mortgage servicing assets (single-family, multifamily and commercial)	11,252,000		14,509,000
Loans Held for Sale	14,527,000		14,559,000
Investment in affordable housing partnerships	7,726,000
Fair Value, Measurements, Nonrecurring | Total Gains (Losses)
Non-covered impaired loans
Total residential	(7,380,000)		(2,955,000)
Total commercial real estate	(39,839,000)		(25,229,000)
Total commercial and industrial	(14,330,000)		(6,427,000)
Total consumer			(641,000)
Total non-covered impaired loans	(61,549,000)		(35,252,000)
Mortgage servicing assets (single-family, multifamily and commercial)	(927,000)		(808,000)
Non-covered OREO	(3,015,000)		(7,054,000)
Covered OREO	(26,251,000)	[1]	(44,002,000)	[1]
Loans Held for Sale	(12,867,000)		(4,104,000)
Investment in affordable housing partnerships	$ (1,296,000)

[1] Covered OREO results from the WFIB and UCB FDIC-assisted acquisitions for which the Company entered into shared-loss agreements with the FDIC whereby the FDIC will reimburse the Company for 80% of eligible losses. As such, the Company?s liability for losses is 20% of the $26.3 million in losses, or $5.3 million, and 20% of the $44.0 million in losses, or $8.8 million, for the year ended December 31, 2011 and 2010, respectively.