Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 2,476,797	$ 2,282,441
30 - 59 Days Past Due	9,168	8,917
60 - 89 Days Past Due	2,350	3,530
Total Past Due	11,518	12,447
Nonaccrual Loans	37,395	53,483
Loans Receivable, Net	2,525,710	2,348,371
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,091,770	966,563
30 - 59 Days Past Due	4,259	1,741
60 - 89 Days Past Due	1,485	2,989
Total Past Due	5,744	4,730
Nonaccrual Loans	9,037	10,124
Loans Receivable, Net	1,106,551	981,417
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	44,817	46,880
30 - 59 Days Past Due	252	407
60 - 89 Days Past Due	12	0
Total Past Due	264	407
Nonaccrual Loans	262	119
Loans Receivable, Net	45,343	47,406
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	41,508	60,764
30 - 59 Days Past Due	193	603
60 - 89 Days Past Due	142	0
Total Past Due	335	603
Nonaccrual Loans	2,349	2,696
Loans Receivable, Net	44,192	64,063
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	42,818	46,161
30 - 59 Days Past Due	311	781
60 - 89 Days Past Due	122	0
Total Past Due	433	781
Nonaccrual Loans	4,076	3,739
Loans Receivable, Net	47,327	50,681
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	387,525	394,691
30 - 59 Days Past Due	1,040	829
60 - 89 Days Past Due	0	298
Total Past Due	1,040	1,127
Nonaccrual Loans	6,608	8,971
Loans Receivable, Net	395,173	404,789
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	603,339	524,225
30 - 59 Days Past Due	2,726	2,872
60 - 89 Days Past Due	227	121
Total Past Due	2,953	2,993
Nonaccrual Loans	8,520	6,775
Loans Receivable, Net	614,812	533,993
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	36,211	12,790
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	36,211	12,790
Real Estate Construction Portfolio Segment [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	15,412	17,249
30 - 59 Days Past Due	0	153
60 - 89 Days Past Due	0	0
Total Past Due	0	153
Nonaccrual Loans	3,084	7,799
Loans Receivable, Net	18,496	25,201
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	29,848	19,555
30 - 59 Days Past Due	0	1,390
60 - 89 Days Past Due	0	0
Total Past Due	0	1,390
Nonaccrual Loans	1,816	2,986
Loans Receivable, Net	31,664	23,931
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	28,342	13,810
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	7,067
Loans Receivable, Net	28,342	20,877
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	155,207	179,753
30 - 59 Days Past Due	387	141
60 - 89 Days Past Due	362	122
Total Past Due	749	263
Nonaccrual Loans	1,643	3,207
Loans Receivable, Net	$ 157,599	$ 183,223