Loans Receivable And Allowance For Credit Losses Landscape (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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	$ 19,900,000		$ 19,900,000		$ 11,200,000
% of Total	100.00%		100.00%		100.00%
Financing Receivable, Gross	7,001,924,000		7,001,924,000		6,253,234,000
Unpaid Principal Balance	171,404,000		171,404,000		235,439,000
Charge-offs	28,672,000		28,672,000		50,110,000
Book Balance, Without Specific Reserve	122,553,000		122,553,000		152,448,000
Book Balance, With Specific Reserve	20,179,000		20,179,000		32,881,000
Specific Reserve	4,829,000		4,829,000		8,463,000
Average Book Balance	162,933,000	272,521,000	164,029,000	276,251,000
Interest Income Recognized	967,000	1,505,000	3,635,000	4,085,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	964,872,000		964,872,000		806,722,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	3,205,148,000		3,205,148,000		2,874,801,000
Unpaid Principal Balance	60,652,000		60,652,000		99,693,000
Charge-offs	18,451,000		18,451,000		24,116,000
Book Balance, Without Specific Reserve	35,210,000		35,210,000		55,834,000
Book Balance, With Specific Reserve	6,991,000		6,991,000		19,743,000
Specific Reserve	1,793,000		1,793,000		3,182,000
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,048,303,000		2,048,303,000		1,817,090,000
Unpaid Principal Balance	59,602,000		59,602,000		78,259,000
Charge-offs	4,780,000		4,780,000		19,177,000
Book Balance, Without Specific Reserve	41,930,000		41,930,000		46,309,000
Book Balance, With Specific Reserve	12,892,000		12,892,000		12,773,000
Specific Reserve	2,740,000		2,740,000		4,916,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	783,601,000		783,601,000		754,621,000
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	75.00%		75.00%		73.00%
Financing Receivable, Gross	5,257,775,000		5,257,775,000		4,564,064,000
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	875,419,000		875,419,000		714,346,000
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	754,887,000		754,887,000		723,698,000
Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	20.00%		20.00%		20.00%
Financing Receivable, Gross	1,428,066,000		1,428,066,000		1,261,577,000
Internally Assigned Grade [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	55,340,000		55,340,000		53,722,000
Internally Assigned Grade [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	16,337,000		16,337,000		17,255,000
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	3.00%		3.00%		4.00%
Financing Receivable, Gross	182,551,000		182,551,000		231,570,000
Special Mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	8,764,000		8,764,000		11,739,000
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	4,712,000		4,712,000		4,864,000
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	2.00%		2.00%		3.00%
Financing Receivable, Gross	128,754,000		128,754,000		187,560,000
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	25,053,000		25,053,000		26,550,000
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	7,665,000		7,665,000		8,804,000
Doubtful/Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	0.00%		0.00%		0.00%
Financing Receivable, Gross	4,778,000		4,778,000		8,463,000
Doubtful/Loss [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	296,000		296,000		365,000
Doubtful/Loss [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	0		0		0
Restructured [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	1.00%		1.00%		1.00%
Financing Receivable, Gross	62,344,000		62,344,000		64,216,000
Restructured [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	23,290,000		23,290,000		22,968,000
Restructured [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	95,000		95,000		307,000
Nonaccrual Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	15,700,000		15,700,000		2,100,000
% of Total	1.00%		1.00%		2.00%
Financing Receivable, Gross	80,387,000		80,387,000		121,113,000
Nonaccrual Financing Receivable [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	17,205,000		17,205,000		20,457,000
Nonaccrual Financing Receivable [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	5,119,000		5,119,000		6,938,000
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	2.00%		2.00%		3.00%
Financing Receivable, Gross	142,731,000		142,731,000		185,329,000
Nonperforming [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	40,495,000		40,495,000		43,425,000
Nonperforming [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	5,214,000		5,214,000		7,245,000
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
% of Total	98.00%		98.00%		97.00%
Financing Receivable, Gross	6,859,193,000		6,859,193,000		6,067,905,000
Performing [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	924,377,000		924,377,000		763,297,000
Performing [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	778,387,000		778,387,000		747,376,000
Residential Real Estate [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	964,872,000		964,872,000		806,722,000
Unpaid Principal Balance	45,620,000		45,620,000		49,816,000
Charge-offs	5,125,000		5,125,000		6,391,000
Book Balance, Without Specific Reserve	40,199,000		40,199,000		43,060,000
Book Balance, With Specific Reserve	296,000		296,000		365,000
Specific Reserve	296,000		296,000		365,000
Average Book Balance	41,662,000	46,485,000	41,960,000	43,231,000
Interest Income Recognized	165,000	174,000	317,000	418,000
Investor Commercial Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,172,433,000		1,172,433,000		1,219,847,000
Unpaid Principal Balance	28,527,000		28,527,000		59,099,000
Charge-offs	3,255,000		3,255,000		8,366,000
Book Balance, Without Specific Reserve	20,774,000		20,774,000		33,540,000
Book Balance, With Specific Reserve	4,498,000		4,498,000		17,193,000
Specific Reserve	1,308,000		1,308,000		2,697,000
Average Book Balance	34,760,000	60,793,000	38,003,000	63,283,000
Interest Income Recognized	109,000	421,000	456,000	1,003,000
Investor Commercial Real Estate [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	652,127,000		652,127,000		599,660,000
Investor Commercial Real Estate [Member] | Internally Assigned Grade [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	421,988,000		421,988,000		472,801,000
Investor Commercial Real Estate [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	66,836,000		66,836,000		77,342,000
Investor Commercial Real Estate [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	30,174,000		30,174,000		67,347,000
Investor Commercial Real Estate [Member] | Doubtful/Loss [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,308,000		1,308,000		2,697,000
Investor Commercial Real Estate [Member] | Restructured [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	7,429,000		7,429,000		4,334,000
Investor Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	17,843,000		17,843,000		46,399,000
Investor Commercial Real Estate [Member] | Nonperforming [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	25,272,000		25,272,000		50,733,000
Investor Commercial Real Estate [Member] | Performing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,147,161,000		1,147,161,000		1,169,114,000
Multifamily [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,962,919,000		1,962,919,000		1,580,289,000
Unpaid Principal Balance	2,802,000		2,802,000		9,554,000
Charge-offs	737,000		737,000		1,405,000
Book Balance, Without Specific Reserve	840,000		840,000		6,873,000
Book Balance, With Specific Reserve	1,225,000		1,225,000		1,276,000
Specific Reserve	219,000		219,000		219,000
Average Book Balance	3,445,000	16,839,000	5,106,000	16,188,000
Interest Income Recognized	4,000	255,000	39,000	350,000
Multifamily [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,880,798,000		1,880,798,000		1,486,824,000
Multifamily [Member] | Internally Assigned Grade [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	68,210,000		68,210,000		74,379,000
Multifamily [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	9,077,000		9,077,000		10,122,000
Multifamily [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	4,615,000		4,615,000		8,745,000
Multifamily [Member] | Doubtful/Loss [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	219,000		219,000		219,000
Multifamily [Member] | Restructured [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,225,000		1,225,000		4,094,000
Multifamily [Member] | Nonaccrual Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	840,000		840,000		4,055,000
Multifamily [Member] | Nonperforming [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,065,000		2,065,000		8,149,000
Multifamily [Member] | Performing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,960,854,000		1,960,854,000		1,572,140,000
Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	69,796,000		69,796,000		74,665,000
Unpaid Principal Balance	29,323,000		29,323,000		31,040,000
Charge-offs	14,459,000		14,459,000		14,345,000
Book Balance, Without Specific Reserve	13,596,000		13,596,000		15,421,000
Book Balance, With Specific Reserve	1,268,000		1,268,000		1,274,000
Specific Reserve	266,000		266,000		266,000
Average Book Balance	16,035,000	58,289,000	15,779,000	64,030,000
Interest Income Recognized	470,000	21,000	2,171,000	873,000
Construction [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	13,785,000		13,785,000		10,946,000
Construction [Member] | Internally Assigned Grade [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	43,640,000		43,640,000		42,518,000
Construction [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,979,000		2,979,000		3,401,000
Construction [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	9,126,000		9,126,000		17,534,000
Construction [Member] | Doubtful/Loss [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	266,000		266,000		266,000
Construction [Member] | Restructured [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	8,814,000		8,814,000		8,551,000
Construction [Member] | Nonaccrual Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	6,050,000		6,050,000		8,144,000
Construction [Member] | Nonperforming [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	14,864,000		14,864,000		16,695,000
Construction [Member] | Performing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	54,932,000		54,932,000		57,970,000
Owner Occupied CRE [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,411,576,000		1,411,576,000		1,276,591,000
Unpaid Principal Balance	55,838,000		55,838,000		61,300,000
Charge-offs	4,780,000		4,780,000		6,452,000
Book Balance, Without Specific Reserve	38,166,000		38,166,000		42,075,000
Book Balance, With Specific Reserve	12,892,000		12,892,000		12,773,000
Specific Reserve	2,740,000		2,740,000		4,916,000
Average Book Balance	56,890,000	73,688,000	52,953,000	73,188,000
Interest Income Recognized	195,000	628,000	589,000	1,406,000
Owner Occupied CRE [Member] | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	659,774,000		659,774,000		678,916,000
Owner Occupied CRE [Member] | Internally Assigned Grade [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	629,299,000		629,299,000		454,348,000
Owner Occupied CRE [Member] | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	73,522,000		73,522,000		85,228,000
Owner Occupied CRE [Member] | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	46,304,000		46,304,000		53,183,000
Owner Occupied CRE [Member] | Doubtful/Loss [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,677,000		2,677,000		4,916,000
Owner Occupied CRE [Member] | Restructured [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	20,266,000		20,266,000		23,152,000
Owner Occupied CRE [Member] | Nonaccrual Financing Receivable [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	30,792,000		30,792,000		31,696,000
Owner Occupied CRE [Member] | Nonperforming [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	51,058,000		51,058,000		54,848,000
Owner Occupied CRE [Member] | Performing [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,360,518,000		1,360,518,000		1,221,743,000
Commercial & Industrial (C&I) [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	636,727,000		636,727,000		540,499,000
Unpaid Principal Balance	3,764,000		3,764,000		16,959,000
Charge-offs	0		0		12,725,000
Book Balance, Without Specific Reserve	3,764,000		3,764,000		4,234,000
Book Balance, With Specific Reserve	0		0		0
Specific Reserve	0		0		0
Average Book Balance	4,488,000	11,530,000	3,999,000	11,122,000
Interest Income Recognized	24,000	6,000	58,000	35,000
Commercial & Industrial (C&I) [Member] | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	420,985,000		420,985,000		349,674,000
Commercial & Industrial (C&I) [Member] | Internally Assigned Grade [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	193,252,000		193,252,000		146,554,000
Commercial & Industrial (C&I) [Member] | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	16,661,000		16,661,000		38,874,000
Commercial & Industrial (C&I) [Member] | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	5,817,000		5,817,000		5,397,000
Commercial & Industrial (C&I) [Member] | Doubtful/Loss [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	12,000		12,000		0
Commercial & Industrial (C&I) [Member] | Restructured [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	1,225,000		1,225,000		810,000
Commercial & Industrial (C&I) [Member] | Nonaccrual Financing Receivable [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	2,538,000		2,538,000		3,424,000
Commercial & Industrial (C&I) [Member] | Nonperforming [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	3,763,000		3,763,000		4,234,000
Commercial & Industrial (C&I) [Member] | Performing [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	632,964,000		632,964,000		536,265,000
Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	783,601,000		783,601,000		754,621,000
Unpaid Principal Balance	5,530,000		5,530,000		7,671,000
Charge-offs	316,000		316,000		426,000
Book Balance, Without Specific Reserve	5,214,000		5,214,000		7,245,000
Book Balance, With Specific Reserve	0		0		0
Specific Reserve	0		0		0
Average Book Balance	5,653,000	4,897,000	6,229,000	5,209,000
Interest Income Recognized	$ 0	$ 0	$ 5,000	$ 0