Noncovered Loans (Analysis of Impaired Loans) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 4,143,866		$ 4,143,866		$ 2,491,049
Recorded Investment of Loans Individually Measured for Specific Impairment	37,152		37,152		34,661
Average Recorded Investment Impaired Loans	34,989	52,937	34,881	54,721
Interest Recognized on Impaired Loans	398	263	717	681
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	5,130		5,130		4,405
Unpaid Principal Balance	15,687		15,687		5,787
Related Allowance	839		839		1,395
Impaired Loans Without Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	32,022		32,022		30,256
Unpaid Principal Balance	44,910		44,910		44,410
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	78,950		78,950		45,251
Recorded Investment of Loans Individually Measured for Specific Impairment	51		51		92
Recorded Investment	51		51		92
Unpaid Principal Balance	7,355		7,355		92
Related Allowance	51		51		92
Average Recorded Investment Impaired Loans	68	138	76	124
Interest Recognized on Impaired Loans	1	2	1	3
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,491,377		1,491,377		1,101,689
Recorded Investment of Loans Individually Measured for Specific Impairment	7,989		7,989		4,862
Recorded Investment	665		665		690
Unpaid Principal Balance	853		853		1,994
Related Allowance	242		242		113
Average Recorded Investment Impaired Loans	6,481	11,331	5,941	10,516
Interest Recognized on Impaired Loans	4	37	8	88
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	721,104		721,104		383,269
Recorded Investment of Loans Individually Measured for Specific Impairment	9,537		9,537		11,904
Recorded Investment	604		604		608
Unpaid Principal Balance	602		602		610
Related Allowance	30		30		38
Average Recorded Investment Impaired Loans	10,437	13,956	10,926	14,159
Interest Recognized on Impaired Loans	230	215	510	518
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,126,047		1,126,047		606,656
Recorded Investment of Loans Individually Measured for Specific Impairment	11,692		11,692		8,156
Recorded Investment	1,252		1,252		2,670
Unpaid Principal Balance	1,257		1,257		2,727
Related Allowance	76		76		1,040
Average Recorded Investment Impaired Loans	10,478	9,207	9,704	8,348
Interest Recognized on Impaired Loans	133	(29)	161	9
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	131,330		131,330		44,672
Recorded Investment of Loans Individually Measured for Specific Impairment	2,345		2,345		2,655
Recorded Investment	2,105		2,105		0
Unpaid Principal Balance	5,145		5,145		0
Related Allowance	262		262		0
Average Recorded Investment Impaired Loans	2,559	3,045	2,591	3,297
Interest Recognized on Impaired Loans	0	0	0	0
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	93,522		93,522		42,103
Recorded Investment of Loans Individually Measured for Specific Impairment	1,532		1,532		2,089
Recorded Investment	337		337		345
Unpaid Principal Balance	360		360		364
Related Allowance	105		105		112
Average Recorded Investment Impaired Loans	1,538	2,053	1,722	2,195
Interest Recognized on Impaired Loans	27	5	31	9
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	32,156		32,156		29,707
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		1,957
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	72	3,121	701	3,775
Interest Recognized on Impaired Loans	0	7	0	16
Real Estate Construction Portfolio Segment [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	16,968		16,968		15,677
Recorded Investment of Loans Individually Measured for Specific Impairment	3,282		3,282		2,819
Recorded Investment	116		116		0
Unpaid Principal Balance	115		115		0
Related Allowance	73		73		0
Average Recorded Investment Impaired Loans	2,931	4,649	2,894	5,562
Interest Recognized on Impaired Loans	1	16	3	16
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	37,732		37,732		36,211
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Average Recorded Investment Impaired Loans	0	0	0	0
Interest Recognized on Impaired Loans	0	0	0	0
Real Estate Construction Portfolio Segment [Member] | Owner Occupied Construction [Member] [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	71,194		71,194		28,342
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	0	4,388	0	5,281
Interest Recognized on Impaired Loans	0	0	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	343,486		343,486		157,472
Recorded Investment of Loans Individually Measured for Specific Impairment	724		724		127
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	425	1,049	326	1,464
Interest Recognized on Impaired Loans	2	10	3	22
Impaired Loans Without Recorded Allowance [Member] | Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	7,324		7,324		4,172
Unpaid Principal Balance	11,139		11,139		6,769
Impaired Loans Without Recorded Allowance [Member] | Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	8,933		8,933		11,296
Unpaid Principal Balance	12,037		12,037		14,642
Impaired Loans Without Recorded Allowance [Member] | Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	10,440		10,440		5,486
Unpaid Principal Balance	14,310		14,310		7,860
Impaired Loans Without Recorded Allowance [Member] | Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	240		240		2,655
Unpaid Principal Balance	507		507		5,727
Impaired Loans Without Recorded Allowance [Member] | Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,195		1,195		1,744
Unpaid Principal Balance	1,336		1,336		1,902
Impaired Loans Without Recorded Allowance [Member] | Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		1,957
Unpaid Principal Balance	0		0		2,570
Impaired Loans Without Recorded Allowance [Member] | Real Estate Construction Portfolio Segment [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,166		3,166		2,819
Unpaid Principal Balance	4,858		4,858		4,813
Impaired Loans Without Recorded Allowance [Member] | Real Estate Construction Portfolio Segment [Member] | Owner Occupied Construction [Member] [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	724		724		127
Unpaid Principal Balance	$ 723		$ 723		$ 127