Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 4,532,695	$ 4,158,873
30 - 59 Days Past Due	16,714	20,754
60 - 89 Days Past Due	1,771	5,809
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	18,485	26,563
Nonaccrual Loans	27,998	34,015
Loans Receivable, Net	4,579,178	4,219,451
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	313,536	322,685
30 - 59 Days Past Due	601	835
60 - 89 Days Past Due	93	823
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	694	1,658
Nonaccrual Loans	3,496	3,991
Loans Receivable, Net	317,726	328,334
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,740,253	1,457,820
30 - 59 Days Past Due	6,484	12,713
60 - 89 Days Past Due	394	681
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	6,878	13,394
Nonaccrual Loans	11,199	12,433
Loans Receivable, Net	1,758,330	1,483,647
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	66,057	72,255
30 - 59 Days Past Due	334	156
60 - 89 Days Past Due	20	17
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	354	173
Nonaccrual Loans	291	176
Loans Receivable, Net	66,702	72,604
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	103,040	100,591
30 - 59 Days Past Due	259	1,993
60 - 89 Days Past Due	0	641
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	259	2,634
Nonaccrual Loans	3,513	2,667
Loans Receivable, Net	106,812	105,892
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	138,874	142,034
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	435	358
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	435	358
Nonaccrual Loans	488	442
Loans Receivable, Net	139,797	142,834
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,201,919	1,138,732
30 - 59 Days Past Due	8,517	144
60 - 89 Days Past Due	90	3,289
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	8,607	3,433
Nonaccrual Loans	3,998	4,267
Loans Receivable, Net	1,214,524	1,146,432
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	51,420	38,916
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	51,420	38,916
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	760,234	749,561
30 - 59 Days Past Due	519	4,714
60 - 89 Days Past Due	739	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	1,258	4,714
Nonaccrual Loans	3,982	6,334
Loans Receivable, Net	765,474	760,609
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	12,431	8,225
30 - 59 Days Past Due	0	199
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	199
Nonaccrual Loans	573	3,246
Loans Receivable, Net	13,004	11,670
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	59,841	41,533
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	458	459
Loans Receivable, Net	60,299	41,992
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	85,090	86,521
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	$ 85,090	$ 86,521