Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 2,420,964	$ 2,282,441
30 - 59 Days Past Due	9,674	8,917
60 - 89 Days Past Due	4,617	3,530
Greater than 90 Days Past Due	0	0
Total Past Due	14,291	12,447
Nonaccrual Loans	41,589	53,483
Loans Receivable, Net	2,476,844	2,348,371
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,079,237	966,563
30 - 59 Days Past Due	4,735	1,741
60 - 89 Days Past Due	572	2,989
Greater than 90 Days Past Due	0	0
Total Past Due	5,307	4,730
Nonaccrual Loans	12,455	10,124
Loans Receivable, Net	1,096,999	981,417
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	41,414	46,880
30 - 59 Days Past Due	58	407
60 - 89 Days Past Due	485	0
Greater than 90 Days Past Due	0	0
Total Past Due	543	407
Nonaccrual Loans	109	119
Loans Receivable, Net	42,066	47,406
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	45,173	60,764
30 - 59 Days Past Due	31	603
60 - 89 Days Past Due	401	0
Greater than 90 Days Past Due	0	0
Total Past Due	432	603
Nonaccrual Loans	2,220	2,696
Loans Receivable, Net	47,825	64,063
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	39,729	46,161
30 - 59 Days Past Due	93	781
60 - 89 Days Past Due	420	0
Greater than 90 Days Past Due	0	0
Total Past Due	513	781
Nonaccrual Loans	3,647	3,739
Loans Receivable, Net	43,889	50,681
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	576,969	524,225
30 - 59 Days Past Due	2,281	2,872
60 - 89 Days Past Due	0	121
Greater than 90 Days Past Due	0	0
Total Past Due	2,281	2,993
Nonaccrual Loans	6,628	6,775
Loans Receivable, Net	585,878	533,993
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	388,011	394,691
30 - 59 Days Past Due	1,124	829
60 - 89 Days Past Due	0	298
Greater than 90 Days Past Due	0	0
Total Past Due	1,124	1,127
Nonaccrual Loans	9,184	8,971
Loans Receivable, Net	398,319	404,789
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	27,027	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	0	7,067
Loans Receivable, Net	27,027	20,877
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	23,974	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	23,974	12,790
Real Estate Construction Portfolio Segment [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	14,139	17,249
30 - 59 Days Past Due	386	153
60 - 89 Days Past Due	1,225	0
Greater than 90 Days Past Due	0	0
Total Past Due	1,611	153
Nonaccrual Loans	3,332	7,799
Loans Receivable, Net	19,082	25,201
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	27,390	19,555
30 - 59 Days Past Due	118	1,390
60 - 89 Days Past Due	1,395	0
Greater than 90 Days Past Due	0	0
Total Past Due	1,513	1,390
Nonaccrual Loans	2,027	2,986
Loans Receivable, Net	30,930	23,931
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	157,901	179,753
30 - 59 Days Past Due	848	141
60 - 89 Days Past Due	119	122
Greater than 90 Days Past Due	0	0
Total Past Due	967	263
Nonaccrual Loans	1,987	3,207
Loans Receivable, Net	$ 160,855	$ 183,223