COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Covered Assets - disclosures
Percentage of eligible losses for which the FDIC is obligated to reimburse the Company	80.00%	80.00%	80.00%
Covered loans (net of allowance for loan losses of $3,505 in 2014 and $7,745 in 2013)	$ 1,474,189,000	$ 2,187,898,000
Covered Loans
Schedule Of Covered Assets - disclosures
Covered loans (net of allowance for loan losses of $3,505 in 2014 and $7,745 in 2013)	1,474,189,000	2,187,898,000
Number of days following the 10th anniversary of the acquisition date upon which the Company will be required to pay a calculated amount to the FDIC	45 days
Percentage of excess resulting from the calculation of liability to the FDIC	50.00%
Percentage of the Intrinsic Loss Estimate used in the calculation of the liability to the FDIC	20.00%
Percentage of the asset discount used in the calculation of the liability to the FDIC	25.00%
Percentage of the Cumulative Shared-Loss Payments used in the calculation of the liability to the FDIC	25.00%
Estimated liability that will be due to the FDIC based on specific thresholds of losses not being reached	110,300,000	74,700,000
Covered Loans | C&I
Schedule Of Covered Assets - disclosures
Term of loan shared-loss agreement	5 years
Term of loss recovery provisions for loans	8 years
UCB Commercial loans and other assets, net of discount	1,100,000,000
Covered Loans | Single-family
Schedule Of Covered Assets - disclosures
Term of loan shared-loss agreement	10 years
Term of loss recovery provisions for loans	10 years
Effective period to term of loan shared-loss agreement and loss recovery provisions for loans	10 years
Covered Loans | United Commercial Bank (UCB)
Schedule Of Covered Assets - disclosures
Percentage of eligible losses for which the FDIC is obligated to reimburse the Company	80.00%
Percentage of eligible losses in excess of a specified amount for which the FDIC is obligated to reimburse the Company	95.00%
Amount of eligible losses over which the FDIC is obligated to reimburse a higher percentage	$ 2,050,000,000
Percentage obligation to reimburse the FDIC for eligible recoveries related to covered assets	80.00%
Percentage obligation to reimburse the FDIC for eligible recoveries related to losses in excess of a specified amount on covered assets	95.00%
Covered Loans | United Commercial Bank (UCB) | C&I
Schedule Of Covered Assets - disclosures
The period of time for commercial loan shared-loss agreements are in effect	3 years
Covered Loans | United Commercial Bank (UCB) | Single-family
Schedule Of Covered Assets - disclosures
The period of time for commercial loan shared-loss agreements are in effect	10 years
Covered Loans | Washington First International Bank (WFIB)
Schedule Of Covered Assets - disclosures
Percentage of eligible losses for which the FDIC is obligated to reimburse the Company	80.00%
Percentage of eligible losses in excess of a specified amount for which the FDIC is obligated to reimburse the Company	95.00%
Percentage obligation to reimburse the FDIC for eligible recoveries related to covered assets	80.00%
Percentage obligation to reimburse the FDIC for eligible recoveries related to losses in excess of a specified amount on covered assets	95.00%
The period of time for commercial loan shared-loss agreements are in effect	3 years
Covered Loans | Washington First International Bank (WFIB) | Minimum
Schedule Of Covered Assets - disclosures
Percentage of loans receivable acquired covered by shared-loss agreements	99.00%
Covered Loans | Washington First International Bank (WFIB) | Single-family
Schedule Of Covered Assets - disclosures
The period of time for commercial loan shared-loss agreements are in effect	10 years