Loans Receivable And Allowance For Credit Losses (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	$ 6,253,234,000	$ 5,518,889,000
Financing Receivable, Deferred Fees, Net	2,860,000	(252,000)
Total allowance for loan losses	(154,345,000)	(177,458,000)	(247,056,000)
Net loans receivable	6,101,749,000	5,341,179,000
Unamortized portion of discounts on acquired loans	21,300,000	4,300,000
Individually evaluated for impairment	126,257,000	243,112,000
Collectively evaluated for impairment	6,126,977,000	5,275,777,000
Individually evaluated for impairment	8,463,000	16,305,000
Collectively evaluated for impairment	145,882,000	161,153,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	177,458,000	247,056,000	343,443,000
Provisions	7,500,000	28,500,000	250,591,000
Charge-offs	(58,737,000)	(129,169,000)	(376,855,000)
Recovery	28,124,000	31,071,000	29,877,000
Ending balance	154,345,000	177,458,000	247,056,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	10,029,000	10,707,000	11,967,000
Provisions	2,500,000	1,500,000	(360,000)
Charge-offs	(4,527,000)	(2,178,000)	(900,000)
Recoveries	0	0	0
Ending balance	8,002,000	10,029,000	10,707,000
Total credit allowance	162,347,000	187,487,000	257,763,000
FHLB and Federal Reserve
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans Pledged as Collateral	4,150,000,000	4,020,000,000
Residential Real Estate
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	806,722,000	688,020,000
Total allowance for loan losses	(19,847,000)	(15,197,000)	(17,307,000)
Individually evaluated for impairment	9,134,000	18,301,000
Collectively evaluated for impairment	797,588,000	669,719,000
Individually evaluated for impairment	365,000	872,000
Collectively evaluated for impairment	19,482,000	14,325,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	15,197,000	17,307,000	28,319,000
Provisions	8,778,000	15,024,000	24,204,000
Charge-offs	(5,203,000)	(18,553,000)	(37,347,000)
Recovery	1,075,000	1,419,000	2,131,000
Ending balance	19,847,000	15,197,000	17,307,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	3,828,000	3,189,000	798,000
Provisions	2,929,000	2,817,000	3,291,000
Charge-offs	(4,527,000)	(2,178,000)	(900,000)
Recoveries	0	0	0
Ending balance	2,230,000	3,828,000	3,189,000
Total credit allowance	22,077,000	19,025,000	20,496,000
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	2,874,801,000	2,451,754,000
Total allowance for loan losses	(48,094,000)	(91,722,000)	(124,907,000)
Individually evaluated for impairment	68,317,000	149,578,000
Collectively evaluated for impairment	2,806,484,000	2,302,176,000
Individually evaluated for impairment	3,182,000	11,170,000
Collectively evaluated for impairment	44,912,000	80,552,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	91,722,000	124,907,000	236,501,000
Provisions	(33,184,000)	19,129,000	151,323,000
Charge-offs	(27,385,000)	(73,379,000)	(283,578,000)
Recovery	16,941,000	21,065,000	20,661,000
Ending balance	48,094,000	91,722,000	124,907,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	2,321,000	4,157,000	9,228,000
Provisions	(1,916,000)	(1,836,000)	(5,071,000)
Charge-offs	0	0	0
Recoveries	0	0	0
Ending balance	405,000	2,321,000	4,157,000
Total credit allowance	48,499,000	94,043,000	129,064,000
Commercial Real Estate | Investor CRE
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,219,847,000	1,275,667,000
Commercial Real Estate | Multifamily
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,580,289,000	1,001,479,000
Commercial Real Estate | Construction
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	74,665,000	174,608,000
Commercial
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,817,090,000	1,704,154,000
Total allowance for loan losses	(41,874,000)	(38,046,000)	(56,951,000)
Individually evaluated for impairment	48,312,000	74,041,000
Collectively evaluated for impairment	1,768,778,000	1,630,113,000
Individually evaluated for impairment	4,916,000	4,206,000
Collectively evaluated for impairment	36,958,000	33,840,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	38,046,000	56,951,000	59,136,000
Provisions	12,189,000	2,708,000	33,764,000
Charge-offs	(17,005,000)	(28,369,000)	(41,165,000)
Recovery	8,644,000	6,756,000	5,216,000
Ending balance	41,874,000	38,046,000	56,951,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	1,796,000	1,515,000	1,952,000
Provisions	1,010,000	281,000	(437,000)
Charge-offs	0	0	0
Recoveries	0	0	0
Ending balance	2,806,000	1,796,000	1,515,000
Total credit allowance	44,680,000	39,842,000	58,466,000
Commercial | Owner Occupied CRE
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,276,591,000	1,272,461,000
Commercial | Commercial & Industrial (C&I)
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	540,499,000	431,693,000
Consumer
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	754,621,000	674,961,000
Total allowance for loan losses	(25,602,000)	(13,427,000)	(14,645,000)
Individually evaluated for impairment	494,000	1,192,000
Collectively evaluated for impairment	754,127,000	673,769,000
Individually evaluated for impairment	0	57,000
Collectively evaluated for impairment	25,602,000	13,370,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	13,427,000	14,645,000	19,198,000
Provisions	19,855,000	5,819,000	8,343,000
Charge-offs	(9,144,000)	(8,868,000)	(14,765,000)
Recovery	1,464,000	1,831,000	1,869,000
Ending balance	25,602,000	13,427,000	14,645,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	1,787,000	817,000	1,107,000
Provisions	331,000	970,000	(290,000)
Charge-offs	0	0	0
Recoveries	0	0	0
Ending balance	2,118,000	1,787,000	817,000
Total credit allowance	27,720,000	15,214,000	15,462,000
Unallocated Financing Receivables
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	0	0
Total allowance for loan losses	(18,928,000)	(19,066,000)	(33,246,000)
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	18,928,000	19,066,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	19,066,000	33,246,000	289,000
Provisions	(138,000)	(14,180,000)	32,957,000
Charge-offs	0	0	0
Recovery	0	0	0
Ending balance	18,928,000	19,066,000	33,246,000
Financing Receivable, Unfunded Credit Commitments [Roll Forward]
Beginning balance	297,000	1,029,000	(1,118,000)
Provisions	146,000	(732,000)	2,147,000
Charge-offs	0	0	0
Recoveries	0	0	0
Ending balance	443,000	297,000	1,029,000
Total credit allowance	$ 19,371,000	$ 19,363,000	$ 34,275,000