Noncovered Loans (Analysis of Impaired Loans) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 2,385,350		$ 2,385,350		$ 2,290,083
Recorded Investment of Loans Individually Measured for Specific Impairment	51,611		51,611		58,288
Average Recorded Investment Impaired Loans	52,937	71,645	54,721	79,138
Interest Recognized on Impaired Loans	263	698	681	2,466
Impaired Loans Without Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	39,811		39,811		53,062
Unpaid Principal Balance	62,920		62,920		81,922
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	11,800		11,800		5,226
Unpaid Principal Balance	20,246		20,246		7,329
Related Allowance	4,265		4,265		1,484
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,050,734		1,050,734		972,531
Recorded Investment of Loans Individually Measured for Specific Impairment	12,129		12,129		8,886
Average Recorded Investment Impaired Loans	11,331	15,807	10,516	20,471
Interest Recognized on Impaired Loans	37	52	88	197
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	45,137		45,137		47,309
Recorded Investment of Loans Individually Measured for Specific Impairment	136		136		97
Average Recorded Investment Impaired Loans	138	101	124	102
Interest Recognized on Impaired Loans	2	1	3	3
Commercial Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	6,448		6,448		5,960
Unpaid Principal Balance	13,770		13,770		12,109
Commercial Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Commercial Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	5,681		5,681		2,926
Unpaid Principal Balance	7,278		7,278		2,927
Related Allowance	3,528		3,528		954
Commercial Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	136		136		97
Unpaid Principal Balance	136		136		97
Related Allowance	136		136		97
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	53,964		53,964		61,584
Recorded Investment of Loans Individually Measured for Specific Impairment	2,051		2,051		2,479
Average Recorded Investment Impaired Loans	2,053	2,644	2,195	2,649
Interest Recognized on Impaired Loans	5	0	9	4
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	41,806		41,806		46,882
Recorded Investment of Loans Individually Measured for Specific Impairment	3,080		3,080		3,799
Average Recorded Investment Impaired Loans	3,045	4,918	3,297	4,567
Interest Recognized on Impaired Loans	0	0	0	648
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	571,151		571,151		527,362
Recorded Investment of Loans Individually Measured for Specific Impairment	8,878		8,878		6,631
Average Recorded Investment Impaired Loans	9,207	8,802	8,348	10,330
Interest Recognized on Impaired Loans	(29)	442	9	452
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	370,798		370,798		390,225
Recorded Investment of Loans Individually Measured for Specific Impairment	14,173		14,173		14,564
Average Recorded Investment Impaired Loans	13,956	16,071	14,159	15,431
Interest Recognized on Impaired Loans	215	64	518	64
Real Estate Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	753		753		1,897
Unpaid Principal Balance	849		849		2,136
Real Estate Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,080		3,080		3,799
Unpaid Principal Balance	6,684		6,684		6,773
Real Estate Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	8,133		8,133		5,944
Unpaid Principal Balance	12,953		12,953		7,700
Real Estate Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	14,173		14,173		14,290
Unpaid Principal Balance	17,938		17,938		18,524
Real Estate Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,298		1,298		582
Unpaid Principal Balance	1,366		1,366		590
Related Allowance	90		90		96
Real Estate Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Real Estate Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	745		745		687
Unpaid Principal Balance	770		770		759
Related Allowance	49		49		63
Real Estate Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		274
Unpaid Principal Balance	0		0		274
Related Allowance	0		0		185
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	22,814		22,814		13,810
Recorded Investment of Loans Individually Measured for Specific Impairment	3,754		3,754		7,067
Average Recorded Investment Impaired Loans	4,388	6,526	5,281	6,878
Interest Recognized on Impaired Loans	0	0	0	0
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	22,122		22,122		12,790
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Average Recorded Investment Impaired Loans	0	0	0	0
Interest Recognized on Impaired Loans	0	0	0	0
Real Estate Construction Portfolio Segment [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	16,949		16,949		17,813
Recorded Investment of Loans Individually Measured for Specific Impairment	3,607		3,607		7,388
Average Recorded Investment Impaired Loans	4,649	8,749	5,562	9,681
Interest Recognized on Impaired Loans	16	138	16	1,083
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	23,469		23,469		18,847
Recorded Investment of Loans Individually Measured for Specific Impairment	2,755		2,755		5,084
Average Recorded Investment Impaired Loans	3,121	2,987	3,775	4,158
Interest Recognized on Impaired Loans	7	0	16	14
Real Estate Construction Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		7,067
Unpaid Principal Balance	0		0		14,947
Real Estate Construction Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Real Estate Construction Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,607		3,607		6,938
Unpaid Principal Balance	6,503		6,503		11,978
Real Estate Construction Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	2,737		2,737		5,025
Unpaid Principal Balance	3,343		3,343		5,116
Real Estate Construction Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,754		3,754		0
Unpaid Principal Balance	9,057		9,057		0
Related Allowance	443		443		0
Real Estate Construction Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Real Estate Construction Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		450
Unpaid Principal Balance	0		0		948
Related Allowance	0		0		0
Real Estate Construction Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	18		18		59
Unpaid Principal Balance	1,468		1,468		1,509
Related Allowance	18		18		59
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	166,406		166,406		180,930
Recorded Investment of Loans Individually Measured for Specific Impairment	1,048		1,048		2,293
Average Recorded Investment Impaired Loans	1,049	5,040	1,464	4,871
Interest Recognized on Impaired Loans	10	1	22	1
Consumer Portfolio Segment [Member] | Impaired Loans Without Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	880		880		2,142
Unpaid Principal Balance	880		880		2,639
Consumer Portfolio Segment [Member] | Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	168		168		151
Unpaid Principal Balance	171		171		225
Related Allowance	$ 1		$ 1		$ 30