Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 4,239,249	$ 4,158,873
30 - 59 Days Past Due	15,155	20,754
60 - 89 Days Past Due	6,275	5,809
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	21,430	26,563
Nonaccrual Loans	36,397	34,015
Loans Receivable, Net	4,297,076	4,219,451
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	319,391	322,685
30 - 59 Days Past Due	772	835
60 - 89 Days Past Due	124	823
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	896	1,658
Nonaccrual Loans	4,880	3,991
Loans Receivable, Net	325,167	328,334
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,502,131	1,457,820
30 - 59 Days Past Due	2,526	12,713
60 - 89 Days Past Due	5,448	681
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	7,974	13,394
Nonaccrual Loans	14,255	12,433
Loans Receivable, Net	1,524,360	1,483,647
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	71,514	72,255
30 - 59 Days Past Due	247	156
60 - 89 Days Past Due	116	17
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	363	173
Nonaccrual Loans	286	176
Loans Receivable, Net	72,163	72,604
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	97,365	100,591
30 - 59 Days Past Due	2,589	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	2,589	2,634
Nonaccrual Loans	2,900	2,667
Loans Receivable, Net	102,854	105,892
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	143,854	142,034
30 - 59 Days Past Due	666	0
60 - 89 Days Past Due	0	358
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	666	358
Nonaccrual Loans	775	442
Loans Receivable, Net	145,295	142,834
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,175,538	1,138,732
30 - 59 Days Past Due	5,951	144
60 - 89 Days Past Due	455	3,289
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	6,406	3,433
Nonaccrual Loans	5,038	4,267
Loans Receivable, Net	1,186,982	1,146,432
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	39,388	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	39,388	38,916
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	746,749	749,561
30 - 59 Days Past Due	1,138	4,714
60 - 89 Days Past Due	132	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	1,270	4,714
Nonaccrual Loans	5,237	6,334
Loans Receivable, Net	753,256	760,609
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	9,922	8,225
30 - 59 Days Past Due	1,164	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	1,164	199
Nonaccrual Loans	2,494	3,246
Loans Receivable, Net	13,580	11,670
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	42,699	41,533
30 - 59 Days Past Due	102	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	102	0
Nonaccrual Loans	532	459
Loans Receivable, Net	43,333	41,992
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	90,698	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	$ 90,698	$ 86,521