Allowance for Loan and Lease Losses and Unfunded Loan Commitments and Letters of Credit (Allowance for Noncovered Loan and Lease Losses) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 54,057	$ 59,748	$ 60,993	$ 53,478
Loans charged off	(4,872)	(7,540)	(16,653)	(31,466)
Recoveries	737	1,126	3,432	2,822
Provision	500	9,000	2,650	37,500
Ending balance	50,422	62,334	50,422	62,334
Commercial Business [Member] \| Secured Debt [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	22,320		21,811
Loans charged off	(1,904)		(6,025)
Recoveries	420		749
Provision	2,462		6,763
Ending balance	23,298		23,298
Specific Reserve	54		54
General Allocation	23,244		23,244
Commercial Business [Member] \| Unsecured Debt [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	573		738
Loans charged off	(42)		(126)
Recoveries	40		408
Provision	167		(282)
Ending balance	738		738
Specific Reserve	0		0
General Allocation	738		738
Real Estate One-To-Four Family [Member] \| Residential [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	847		1,100
Loans charged off	(53)		(717)
Recoveries	78		78
Provision	70		481
Ending balance	942		942
Specific Reserve	0		0
General Allocation	942		942
Real Estate Commercial & Multifamily Residential [Member] \| Commercial Land [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	894		634
Loans charged off	(4)		(660)
Recoveries	0		0
Provision	(130)		786
Ending balance	760		760
Specific Reserve	0		0
General Allocation	760		760
Real Estate Commercial & Multifamily Residential [Member] \| Income Property Multifamily [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	14,709		15,210
Loans charged off	(339)		(979)
Recoveries	10		65
Provision	(5,407)		(5,323)
Ending balance	8,973		8,973
Specific Reserve	297		297
General Allocation	8,676		8,676
Real Estate Commercial & Multifamily Residential [Member] \| Owner Occupied [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	6,479		9,692
Loans charged off	(100)		(723)
Recoveries	0		31
Provision	311		(2,310)
Ending balance	6,690		6,690
Specific Reserve	408		408
General Allocation	6,282		6,282
Construction One-To-Four Family Residential[Member] \| Land and Acquisition [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,852		3,769
Loans charged off	(169)		(1,347)
Recoveries	63		1,831
Provision	269		(1,238)
Ending balance	3,015		3,015
Specific Reserve	175		175
General Allocation	2,840		2,840
Construction One-To-Four Family Residential[Member] \| Residential Construction [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	1,704		2,292
Loans charged off	(14)		(1,068)
Recoveries	56		92
Provision	(222)		208
Ending balance	1,524		1,524
Specific Reserve	0		0
General Allocation	1,524		1,524
Construction Commercial & Multifamily Residential [Member] \| Income Property Multifamily [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	43		274
Loans charged off	(145)		(1,710)
Recoveries	0		0
Provision	157		1,491
Ending balance	55		55
Specific Reserve	0		0
General Allocation	55		55
Construction Commercial & Multifamily Residential [Member] \| Owner Occupied [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	34		70
Loans charged off	0		0
Recoveries	0		0
Provision	(7)		(43)
Ending balance	27		27
Specific Reserve	0		0
General Allocation	27		27
Consumer [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,748		2,120
Loans charged off	(2,102)		(3,298)
Recoveries	70		178
Provision	2,985		4,701
Ending balance	3,701		3,701
Specific Reserve	32		32
General Allocation	3,669		3,669
Unallocated [Member] \| Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	854		3,283
Loans charged off	0		0
Recoveries	0		0
Provision	(155)		(2,584)
Ending balance	699		699
Specific Reserve	0		0
General Allocation	699		699
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	54,057		60,993
Loans charged off	(4,872)		(16,653)
Recoveries	737		3,432
Provision	500		2,650
Ending balance	50,422		50,422
Specific Reserve	966		966
General Allocation	$ 49,456		$ 49,456

The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

-Paragraph 8

-Subparagraph a(ii)

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 9

-Section 03

-Paragraph 7

-Subparagraph d

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

+ Details