Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 2,301,034	$ 2,282,441
30 - 59 Days Past Due	9,104	8,917
60 - 89 Days Past Due	4,128	3,530
Greater than 90 Days Past Due	0	0
Total Past Due	13,232	12,447
Nonaccrual Loans	57,552	53,483
Loans Receivable, Net	2,371,818	2,348,371
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,006,841	966,563
30 - 59 Days Past Due	3,279	1,741
60 - 89 Days Past Due	3,606	2,989
Greater than 90 Days Past Due	0	0
Total Past Due	6,885	4,730
Nonaccrual Loans	14,676	10,124
Loans Receivable, Net	1,028,402	981,417
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	46,796	46,880
30 - 59 Days Past Due	235	407
60 - 89 Days Past Due	119	0
Greater than 90 Days Past Due	0	0
Total Past Due	354	407
Nonaccrual Loans	115	119
Loans Receivable, Net	47,265	47,406
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	55,486	60,764
30 - 59 Days Past Due	682	603
60 - 89 Days Past Due	84	0
Greater than 90 Days Past Due	0	0
Total Past Due	766	603
Nonaccrual Loans	2,624	2,696
Loans Receivable, Net	58,876	64,063
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	41,948	46,161
30 - 59 Days Past Due	0	781
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	781
Nonaccrual Loans	3,432	3,739
Loans Receivable, Net	45,380	50,681
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	542,839	524,225
30 - 59 Days Past Due	2,960	2,872
60 - 89 Days Past Due	0	121
Greater than 90 Days Past Due	0	0
Total Past Due	2,960	2,993
Nonaccrual Loans	12,771	6,775
Loans Receivable, Net	558,570	533,993
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	369,579	394,691
30 - 59 Days Past Due	1,948	829
60 - 89 Days Past Due	0	298
Greater than 90 Days Past Due	0	0
Total Past Due	1,948	1,127
Nonaccrual Loans	8,669	8,971
Loans Receivable, Net	380,196	404,789
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	14,212	13,810
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	5,023	7,067
Loans Receivable, Net	19,235	20,877
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	16,008	12,790
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	16,008	12,790
Real Estate Construction Portfolio Segment [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	16,974	17,249
30 - 59 Days Past Due	0	153
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	153
Nonaccrual Loans	6,410	7,799
Loans Receivable, Net	23,384	25,201
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	21,778	19,555
30 - 59 Days Past Due	0	1,390
60 - 89 Days Past Due	319	0
Greater than 90 Days Past Due	0	0
Total Past Due	319	1,390
Nonaccrual Loans	2,383	2,986
Loans Receivable, Net	24,480	23,931
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	168,573	179,753
30 - 59 Days Past Due	0	141
60 - 89 Days Past Due	0	122
Greater than 90 Days Past Due	0	0
Total Past Due	0	263
Nonaccrual Loans	1,449	3,207
Loans Receivable, Net	$ 170,022	$ 183,223