Allowance for Non-Covered Loan Loss and Credit Quality (Internal Risk Rating By Loan Class) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 7,235,115	$ 6,693,603	$ 6,260,525
Deferred loan fees, net	(6,211)	(12,523)	(12,100)
Total loans and leases	7,228,904	6,681,080
Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	4,005,983	3,938,443
Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	247,809	202,118
Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	78,998	57,209
Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	769,173	797,802
LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,283,129	923,328
Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	550,200	476,579
Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	256,202	260,797
Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	43,621	37,327
Pass/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	6,721,850	6,070,376
Percentage of impaired loans	5.90%	9.00%
Pass/Watch [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,646,254	3,515,753
Pass/Watch [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	227,008	166,660
Pass/Watch [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	54,480	25,082
Pass/Watch [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	722,140	718,122
Pass/Watch [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,227,521	880,385
Pass/Watch [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	546,048	469,325
Pass/Watch [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	254,912	258,252
Pass/Watch [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	43,487	36,797
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	204,960	268,002
Percentage of impaired loans	2.80%	1.70%
Special Mention [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	147,094	203,643
Special Mention [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,894	12,666
Special Mention [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,896	4,379
Special Mention [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	15,210	22,255
Special Mention [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	35,349	19,521
Special Mention [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,466	3,507
Special Mention [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	945	1,612
Special Mention [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	106	419
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	193,200	209,398
Percentage of impaired loans	91.30%	89.30%
Substandard [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	148,258	134,625
Substandard [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	4,126	6,063
Substandard [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,398	5,064
Substandard [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	20,988	46,893
Substandard [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	15,830	15,576
Substandard [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	570	1,120
Substandard [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	15	0
Substandard [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	15	57
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,364	0
Doubtful [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,364	0
Doubtful [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Doubtful [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,623	3,418
Loss [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Loss [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Loss [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Loss [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Loss [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	164	0
Loss [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,116	2,627
Loss [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	330	758
Loss [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	13	33
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	110,118	142,409
Impaired [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	64,377	84,422
Impaired [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	14,781	16,729
Impaired [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	18,224	22,684
Impaired [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	10,835	10,532
Impaired [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,901	7,846
Impaired [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	0
Impaired [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	175
Impaired [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 0	$ 21