Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	$ 4,128,467	$ 2,476,797
30 - 59 Days Past Due	23,351	9,168
60 - 89 Days Past Due	5,951	2,350
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2	0
Total Past Due	29,304	11,518
Nonaccrual Loans	35,961	37,395
Loans Receivable, Net	4,193,732	2,525,710
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	325,614	155,207
30 - 59 Days Past Due	1,375	387
60 - 89 Days Past Due	369	362
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1	0
Total Past Due	1,745	749
Nonaccrual Loans	4,036	1,643
Loans Receivable, Net	331,395	157,599
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,465,682	1,091,770
30 - 59 Days Past Due	6,520	4,259
60 - 89 Days Past Due	3,306	1,485
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1	0
Total Past Due	9,827	5,744
Nonaccrual Loans	11,839	9,037
Loans Receivable, Net	1,487,348	1,106,551
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	74,756	44,817
30 - 59 Days Past Due	72	252
60 - 89 Days Past Due	4	12
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	76	264
Nonaccrual Loans	156	262
Loans Receivable, Net	74,988	45,343
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	99,413	41,508
30 - 59 Days Past Due	2,232	193
60 - 89 Days Past Due	224	142
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	2,456	335
Nonaccrual Loans	2,220	2,349
Loans Receivable, Net	104,089	44,192
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	133,942	42,818
30 - 59 Days Past Due	0	311
60 - 89 Days Past Due	0	122
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	433
Nonaccrual Loans	890	4,076
Loans Receivable, Net	134,832	47,327
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,125,012	603,339
30 - 59 Days Past Due	7,687	2,726
60 - 89 Days Past Due	0	227
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	7,687	2,953
Nonaccrual Loans	7,756	8,520
Loans Receivable, Net	1,140,455	614,812
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	39,064	36,211
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	39,064	36,211
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	728,002	387,525
30 - 59 Days Past Due	5,465	1,040
60 - 89 Days Past Due	2,048	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	7,513	1,040
Nonaccrual Loans	5,379	6,608
Loans Receivable, Net	740,894	395,173
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	9,014	15,412
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	3,226	3,084
Loans Receivable, Net	12,240	18,496
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	39,928	29,848
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	459	1,816
Loans Receivable, Net	40,387	31,664
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	88,040	28,342
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	$ 88,040	$ 28,342