Allowance for Non-Covered Loan Loss and Credit Quality (Internal Risk Rating By Loan Class) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 6,797,890	$ 6,693,603	$ 6,116,730
Deferred loan fees, net	(10,773)	(12,523)	(12,300)
Total loans and leases	6,787,117	6,681,080
Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,930,403	3,938,443
Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	226,924	202,118
Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	66,750	57,209
Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	770,083	797,802
LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	994,659	923,328
Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	508,815	476,579
Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	258,240	260,797
Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	42,016	37,327
Pass/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	6,244,594	6,070,376
Percentage of impaired loans	9.90%	9.00%
Pass/Watch [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,544,220	3,515,753
Pass/Watch [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	203,716	166,660
Pass/Watch [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	39,217	25,082
Pass/Watch [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	709,542	718,122
Pass/Watch [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	949,054	880,385
Pass/Watch [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	500,318	469,325
Pass/Watch [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	256,708	258,252
Pass/Watch [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	41,819	36,797
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	211,779	268,002
Percentage of impaired loans	1.90%	1.70%
Special Mention [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	144,128	203,643
Special Mention [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	8,861	12,666
Special Mention [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,352	4,379
Special Mention [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	20,959	22,255
Special Mention [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	31,038	19,521
Special Mention [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,630	3,507
Special Mention [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	737	1,612
Special Mention [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	74	419
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	208,687	209,398
Percentage of impaired loans	88.20%	89.30%
Substandard [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	163,333	134,625
Substandard [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,914	6,063
Substandard [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	3,522	5,064
Substandard [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	27,171	46,893
Substandard [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	11,933	15,576
Substandard [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	688	1,120
Substandard [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	52	0
Substandard [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	74	57
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	0	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	0	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	5,494	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	0	0
Loss [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	4,702	2,627
Loss [Member] | Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	743	758
Loss [Member] | Consumer & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	49	33
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	127,336	142,409
Impaired [Member] | Term & Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	78,722	84,422
Impaired [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	12,433	16,729
Impaired [Member] | Residential Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	20,659	22,684
Impaired [Member] | Term [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	12,411	10,532
Impaired [Member] | LOC & Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,634	7,846
Impaired [Member] | Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	477	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