Loans Receivable And Allowance For Credit Losses Landscape (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 18,200,000		$ 18,200,000		$ 11,200,000
% of Total	100.00%		100.00%		100.00%
Financing Receivable, Gross	7,154,243,000		7,154,243,000		6,253,234,000
Unpaid Principal Balance	156,798,000		156,798,000		235,439,000
Charge-offs	38,832,000		38,832,000		50,110,000
Book Balance, Without Specific Reserve	97,060,000		97,060,000		152,448,000
Book Balance, With Specific Reserve	20,906,000		20,906,000		32,881,000
Specific Reserve	4,900,000		4,900,000		8,463,000
Average Book Balance	130,347,000	238,890,000	151,648,000	249,800,000
Interest Income Recognized	555,000	1,566,000	4,190,000	5,651,000
Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	19.00%		19.00%		20.00%
Financing Receivable, Gross	1,388,167,000		1,388,167,000		1,261,577,000
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	76.00%		76.00%		73.00%
Financing Receivable, Gross	5,464,086,000		5,464,086,000		4,564,064,000
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	3.00%		3.00%		4.00%
Financing Receivable, Gross	183,144,000		183,144,000		231,570,000
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	2.00%		2.00%		3.00%
Financing Receivable, Gross	114,964,000		114,964,000		187,560,000
Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	0.00%		0.00%		0.00%
Financing Receivable, Gross	3,882,000		3,882,000		8,463,000
Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	1.00%		1.00%		1.00%
Financing Receivable, Gross	52,556,000		52,556,000		64,216,000
Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	6,800,000		6,800,000		2,100,000
% of Total	1.00%		1.00%		2.00%
Financing Receivable, Gross	65,410,000		65,410,000		121,113,000
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	2.00%		2.00%		3.00%
Financing Receivable, Gross	117,966,000		117,966,000		185,329,000
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	98.00%		98.00%		97.00%
Financing Receivable, Gross	7,036,277,000		7,036,277,000		6,067,905,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,052,381,000		1,052,381,000		806,722,000
Unpaid Principal Balance	42,761,000		42,761,000		49,816,000
Charge-offs	4,951,000		4,951,000		6,391,000
Book Balance, Without Specific Reserve	37,523,000		37,523,000		43,060,000
Book Balance, With Specific Reserve	287,000		287,000		365,000
Specific Reserve	287,000		287,000		365,000
Average Book Balance	39,152,000	43,393,000	40,618,000	43,065,000
Interest Income Recognized	129,000	170,000	446,000	588,000
Residential Real Estate [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	53,331,000		53,331,000		53,722,000
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	968,158,000		968,158,000		714,346,000
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	8,816,000		8,816,000		11,739,000
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	21,789,000		21,789,000		26,550,000
Residential Real Estate [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	287,000		287,000		365,000
Residential Real Estate [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	22,153,000		22,153,000		22,968,000
Residential Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	15,657,000		15,657,000		20,457,000
Residential Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	37,810,000		37,810,000		43,425,000
Residential Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,014,571,000		1,014,571,000		763,297,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	3,208,226,000		3,208,226,000		2,874,801,000
Unpaid Principal Balance	48,227,000		48,227,000		99,693,000
Charge-offs	16,945,000		16,945,000		24,116,000
Book Balance, Without Specific Reserve	25,755,000		25,755,000		55,834,000
Book Balance, With Specific Reserve	5,527,000		5,527,000		19,743,000
Specific Reserve	1,444,000		1,444,000		3,182,000
Investor CRE [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,125,477,000		1,125,477,000		1,219,847,000
Unpaid Principal Balance	28,274,000		28,274,000		59,099,000
Charge-offs	4,254,000		4,254,000		8,366,000
Book Balance, Without Specific Reserve	18,956,000		18,956,000		33,540,000
Book Balance, With Specific Reserve	5,064,000		5,064,000		17,193,000
Specific Reserve	1,292,000		1,292,000		2,697,000
Average Book Balance	24,646,000	63,746,000	37,376,000	52,656,000
Interest Income Recognized	147,000	278,000	603,000	1,281,000
Investor CRE [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	448,165,000		448,165,000		472,801,000
Investor CRE [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	580,017,000		580,017,000		599,660,000
Investor CRE [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	71,575,000		71,575,000		77,342,000
Investor CRE [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	24,428,000		24,428,000		67,347,000
Investor CRE [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,292,000		1,292,000		2,697,000
Investor CRE [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	7,351,000		7,351,000		4,334,000
Investor CRE [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	16,669,000		16,669,000		46,399,000
Investor CRE [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	24,020,000		24,020,000		50,733,000
Investor CRE [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,101,457,000		1,101,457,000		1,169,114,000
Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,029,820,000		2,029,820,000		1,580,289,000
Unpaid Principal Balance	2,310,000		2,310,000		9,554,000
Charge-offs	737,000		737,000		1,405,000
Book Balance, Without Specific Reserve	1,573,000		1,573,000		6,873,000
Book Balance, With Specific Reserve	0		0		1,276,000
Specific Reserve	0		0		219,000
Average Book Balance	1,819,000	17,865,000	4,860,000	7,544,000
Interest Income Recognized	22,000	55,000	61,000	405,000
Multifamily [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	76,840,000		76,840,000		74,379,000
Multifamily [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,940,743,000		1,940,743,000		1,486,824,000
Multifamily [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	10,894,000		10,894,000		10,122,000
Multifamily [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,343,000		1,343,000		8,745,000
Multifamily [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	0		0		219,000
Multifamily [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,216,000		1,216,000		4,094,000
Multifamily [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	357,000		357,000		4,055,000
Multifamily [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,573,000		1,573,000		8,149,000
Multifamily [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,028,247,000		2,028,247,000		1,572,140,000
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	52,929,000		52,929,000		74,665,000
Unpaid Principal Balance	17,643,000		17,643,000		31,040,000
Charge-offs	11,954,000		11,954,000		14,345,000
Book Balance, Without Specific Reserve	5,226,000		5,226,000		15,421,000
Book Balance, With Specific Reserve	463,000		463,000		1,274,000
Specific Reserve	152,000		152,000		266,000
Average Book Balance	10,276,000	30,152,000	11,192,000	61,340,000
Interest Income Recognized	60,000	692,000	2,231,000	1,565,000
Construction [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	30,515,000		30,515,000		42,518,000
Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	17,017,000		17,017,000		10,946,000
Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,159,000		1,159,000		3,401,000
Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	4,086,000		4,086,000		17,534,000
Construction [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	152,000		152,000		266,000
Construction [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,101,000		2,101,000		8,551,000
Construction [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	3,588,000		3,588,000		8,144,000
Construction [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	5,689,000		5,689,000		16,695,000
Construction [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	47,240,000		47,240,000		57,970,000
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,085,672,000		2,085,672,000		1,817,090,000
Unpaid Principal Balance	60,889,000		60,889,000		78,259,000
Charge-offs	16,699,000		16,699,000		19,177,000
Book Balance, Without Specific Reserve	29,098,000		29,098,000		46,309,000
Book Balance, With Specific Reserve	15,092,000		15,092,000		12,773,000
Specific Reserve	3,169,000		3,169,000		4,916,000
Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,404,006,000		1,404,006,000		1,276,591,000
Unpaid Principal Balance	46,212,000		46,212,000		61,300,000
Charge-offs	4,743,000		4,743,000		6,452,000
Book Balance, Without Specific Reserve	26,377,000		26,377,000		42,075,000
Book Balance, With Specific Reserve	15,092,000		15,092,000		12,773,000
Specific Reserve	3,169,000		3,169,000		4,916,000
Average Book Balance	46,263,000	68,270,000	48,159,000	68,353,000
Interest Income Recognized	184,000	316,000	773,000	1,722,000
Owner Occupied CRE [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	571,100,000		571,100,000		454,348,000
Owner Occupied CRE [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	727,604,000		727,604,000		678,916,000
Owner Occupied CRE [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	63,805,000		63,805,000		85,228,000
Owner Occupied CRE [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	39,349,000		39,349,000		53,183,000
Owner Occupied CRE [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,148,000		2,148,000		4,916,000
Owner Occupied CRE [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	19,035,000		19,035,000		23,152,000
Owner Occupied CRE [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	22,434,000		22,434,000		31,696,000
Owner Occupied CRE [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	41,469,000		41,469,000		54,848,000
Owner Occupied CRE [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,362,537,000		1,362,537,000		1,221,743,000
Commercial & Industrial (C&I) [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	681,666,000		681,666,000		540,499,000
Unpaid Principal Balance	14,677,000		14,677,000		16,959,000
Charge-offs	11,956,000		11,956,000		12,725,000
Book Balance, Without Specific Reserve	2,721,000		2,721,000		4,234,000
Book Balance, With Specific Reserve	0		0		0
Specific Reserve	0		0		0
Average Book Balance	3,242,000	10,137,000	3,478,000	10,895,000
Interest Income Recognized	13,000	51,000	71,000	86,000
Commercial & Industrial (C&I) [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	192,527,000		192,527,000		146,554,000
Commercial & Industrial (C&I) [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	450,283,000		450,283,000		349,674,000
Commercial & Industrial (C&I) [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	20,792,000		20,792,000		38,874,000
Commercial & Industrial (C&I) [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	18,061,000		18,061,000		5,397,000
Commercial & Industrial (C&I) [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	3,000		3,000		0
Commercial & Industrial (C&I) [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	678,000		678,000		810,000
Commercial & Industrial (C&I) [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,043,000		2,043,000		3,424,000
Commercial & Industrial (C&I) [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,721,000		2,721,000		4,234,000
Commercial & Industrial (C&I) [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	678,945,000		678,945,000		536,265,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	807,964,000		807,964,000		754,621,000
Unpaid Principal Balance	4,921,000		4,921,000		7,671,000
Charge-offs	237,000		237,000		426,000
Book Balance, Without Specific Reserve	4,684,000		4,684,000		7,245,000
Book Balance, With Specific Reserve	0		0		0
Specific Reserve	0		0		0
Average Book Balance	4,949,000	5,327,000	5,965,000	5,947,000
Interest Income Recognized	0	4,000	5,000	4,000
Consumer [Member] | Marginal [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	15,689,000		15,689,000		17,255,000
Consumer [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	780,264,000		780,264,000		723,698,000
Consumer [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	6,103,000		6,103,000		4,864,000
Consumer [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	5,908,000		5,908,000		8,804,000
Consumer [Member] | Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	0		0		0
Consumer [Member] | Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	22,000		22,000		307,000
Consumer [Member] | Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	4,662,000		4,662,000		6,938,000
Consumer [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	4,684,000		4,684,000		7,245,000
Consumer [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	$ 803,280,000		$ 803,280,000		$ 747,376,000