Loans Receivable and Allowance For Credit Losses (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	$ 7,457,819,000	$ 6,253,234,000
Deferred loan fees, net	10,703,000	2,860,000
Allowance for loan losses	137,294,000	154,345,000	177,458,000	247,056,000
Loans receivable, net	7,331,228,000	6,101,749,000
FHLB and Federal Reserve
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans Pledged as Collateral	4,950,000,000	4,150,000,000
Residential real estate [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,119,574,000	806,722,000
Allowance for loan losses	14,245,000	19,847,000	15,197,000	17,307,000
Commercial real estate
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	3,342,895,000	2,874,801,000
Allowance for loan losses	41,153,000	48,094,000	91,722,000	124,907,000
Investor CRE [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,114,768,000	1,219,847,000
Multifamily [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	2,156,434,000	1,580,289,000
Construction [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	71,693,000	74,665,000
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	3,342,895,000	2,874,801,000
Commercial [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	2,173,282,000	1,817,090,000
Allowance for loan losses	42,114,000	41,874,000	38,046,000	56,951,000
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	1,431,140,000	1,276,591,000
Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	742,142,000	540,499,000
Commercial Real Estate Other Receivable [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	2,173,282,000	1,817,090,000
Consumer [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	822,068,000	754,621,000
Allowance for loan losses	27,578,000	25,602,000	13,427,000	14,645,000
Unallocated
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total loans receivable, gross	0	0
Allowance for loan losses	$ 12,204,000	$ 18,928,000	$ 19,066,000	$ 33,246,000