Noncovered Loans (Analysis of Impaired Loans) (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 2,198,303	$ 1,828,071
Recorded Investment of Loans Individually Measured for Specific Impairment	59,596	91,173
Average Recorded Investment Impaired Loans	74,253
Interest Recognized on Impaired Loans	1,029
Commercial Business [Member] | Impaired Loans With Recorded Allowance [Member] | Secured Debt [Member]
Recorded Investment	273	2,717
Unpaid Principal Balance	273	2,758
Related Allowance	54	600
Commercial Business [Member] | Secured Debt [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	908,699	724,665
Recorded Investment of Loans Individually Measured for Specific Impairment	7,591	29,793
Average Recorded Investment Impaired Loans	17,251
Interest Recognized on Impaired Loans	16
Commercial Business [Member] | Secured Debt [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	7,318	27,081
Unpaid Principal Balance	14,810	26,913
Commercial Business [Member] | Impaired Loans With Recorded Allowance [Member] | Unsecured Debt [Member]
Recorded Investment	0	75
Unpaid Principal Balance	0	75
Related Allowance	0	75
Commercial Business [Member] | Unsecured Debt [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	58,548	40,808
Recorded Investment of Loans Individually Measured for Specific Impairment	288	104
Average Recorded Investment Impaired Loans	148
Interest Recognized on Impaired Loans	0
Commercial Business [Member] | Unsecured Debt [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	288	29
Unpaid Principal Balance	609	30
Real Estate One-To-Four Family [Member] | Impaired Loans With Recorded Allowance [Member] | Residential [Member]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Real Estate One-To-Four Family [Member] | Residential [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	61,629	46,728
Recorded Investment of Loans Individually Measured for Specific Impairment	2,044	2,655
Average Recorded Investment Impaired Loans	2,498
Interest Recognized on Impaired Loans	0
Real Estate One-To-Four Family [Member] | Residential [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	2,044	2,658
Unpaid Principal Balance	2,283	2,949
Real Estate Commercial & Multifamily Residential [Member] | Impaired Loans With Recorded Allowance [Member] | Commercial Land [Member]
Recorded Investment	0	3,062
Unpaid Principal Balance	0	5,225
Related Allowance	0	0
Real Estate Commercial & Multifamily Residential [Member] | Commercial Land [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	44,316	20,959
Recorded Investment of Loans Individually Measured for Specific Impairment	3,816	3,863
Average Recorded Investment Impaired Loans	4,380
Interest Recognized on Impaired Loans	0
Real Estate Commercial & Multifamily Residential [Member] | Commercial Land [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	3,816	804
Unpaid Principal Balance	6,781	826
Real Estate Commercial & Multifamily Residential [Member] | Impaired Loans With Recorded Allowance [Member] | Income Property Multifamily [Member]
Recorded Investment	2,588	3,094
Unpaid Principal Balance	3,512	3,139
Related Allowance	297	59
Real Estate Commercial & Multifamily Residential [Member] | Income Property Multifamily [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	519,745	427,799
Recorded Investment of Loans Individually Measured for Specific Impairment	6,786	10,595
Average Recorded Investment Impaired Loans	9,444
Interest Recognized on Impaired Loans	526
Real Estate Commercial & Multifamily Residential [Member] | Income Property Multifamily [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	4,198	10,292
Unpaid Principal Balance	5,673	12,253
Real Estate Commercial & Multifamily Residential [Member] | Impaired Loans With Recorded Allowance [Member] | Owner Occupied [Member]
Recorded Investment	1,528	0
Unpaid Principal Balance	2,186	0
Related Allowance	408	0
Real Estate Commercial & Multifamily Residential [Member] | Owner Occupied [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	376,391	317,010
Recorded Investment of Loans Individually Measured for Specific Impairment	15,414	14,103
Average Recorded Investment Impaired Loans	15,427
Interest Recognized on Impaired Loans	298
Real Estate Commercial & Multifamily Residential [Member] | Owner Occupied [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	13,886	14,152
Unpaid Principal Balance	16,616	17,099
Construction One-To-Four Family Residential[Member] | Impaired Loans With Recorded Allowance [Member] | Land and Acquisition [Member]
Recorded Investment	1,216	533
Unpaid Principal Balance	1,813	549
Related Allowance	175	3
Construction One-To-Four Family Residential[Member] | Land and Acquisition [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	17,550	25,362
Recorded Investment of Loans Individually Measured for Specific Impairment	8,427	11,543
Average Recorded Investment Impaired Loans	9,368
Interest Recognized on Impaired Loans	176
Construction One-To-Four Family Residential[Member] | Land and Acquisition [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	7,211	11,013
Unpaid Principal Balance	12,210	20,718
Construction One-To-Four Family Residential[Member] | Impaired Loans With Recorded Allowance [Member] | Residential Construction [Member]
Recorded Investment	0	915
Unpaid Principal Balance	0	1,723
Related Allowance	0	62
Construction One-To-Four Family Residential[Member] | Residential Construction [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	20,830	24,655
Recorded Investment of Loans Individually Measured for Specific Impairment	5,115	6,400
Average Recorded Investment Impaired Loans	4,397
Interest Recognized on Impaired Loans	0
Construction One-To-Four Family Residential[Member] | Residential Construction [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	5,115	5,585
Unpaid Principal Balance	6,563	9,824
Construction Commercial & Multifamily Residential [Member] | Impaired Loans With Recorded Allowance [Member] | Income Property Multifamily [Member]
Recorded Investment	0	6,792
Unpaid Principal Balance	0	10,515
Related Allowance	0	175
Construction Commercial & Multifamily Residential [Member] | Income Property Multifamily [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	6,178	10,666
Recorded Investment of Loans Individually Measured for Specific Impairment	7,623	7,584
Average Recorded Investment Impaired Loans	7,064
Interest Recognized on Impaired Loans	0
Construction Commercial & Multifamily Residential [Member] | Income Property Multifamily [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	7,623	792
Unpaid Principal Balance	14,963	2,401
Construction Commercial & Multifamily Residential [Member] | Impaired Loans With Recorded Allowance [Member] | Owner Occupied [Member]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Construction Commercial & Multifamily Residential [Member] | Owner Occupied [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	10,358	11,935
Recorded Investment of Loans Individually Measured for Specific Impairment	0	0
Average Recorded Investment Impaired Loans	0
Interest Recognized on Impaired Loans	0
Construction Commercial & Multifamily Residential [Member] | Owner Occupied [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Consumer [Member] | Impaired Loans With Recorded Allowance [Member]
Recorded Investment	154	0
Unpaid Principal Balance	226	0
Related Allowance	32	0
Impaired Loans With Recorded Allowance [Member]
Recorded Investment	5,759	17,188
Unpaid Principal Balance	8,010	23,984
Related Allowance	966	974
Consumer [Member] | Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	2,338	4,533
Unpaid Principal Balance	2,832	4,691
Impaired Loans Without Recorded Allowance [Member]
Recorded Investment	53,837	76,939
Unpaid Principal Balance	83,340	97,704
Consumer [Member]
Recorded Investment of Loans Collectively Measured for Contingency Provision	174,059	177,484
Recorded Investment of Loans Individually Measured for Specific Impairment	2,492	4,533
Average Recorded Investment Impaired Loans	4,276
Interest Recognized on Impaired Loans	$ 13