Noncovered Loans (Analysis of Impaired Loans) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 4,270,389		$ 4,193,062
Recorded Investment of Loans Individually Measured for Specific Impairment	26,687		26,389
Recorded Investment	21		23
Unpaid Principal Balance	26		27
Related Allowance	3		4
Average Recorded Investment Impaired Loans	26,538	33,743
Interest Recognized on Impaired Loans	336	322
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	90,698		86,521
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	325,008		328,167
Recorded Investment of Loans Individually Measured for Specific Impairment	159		167
Average Recorded Investment Impaired Loans	163	127
Interest Recognized on Impaired Loans	2	2
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	43,333		41,992
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	0	1,051
Interest Recognized on Impaired Loans	0	2
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	12,386		9,726
Recorded Investment of Loans Individually Measured for Specific Impairment	1,194		1,944
Recorded Investment	113		113
Unpaid Principal Balance	112		113
Related Allowance	71		71
Average Recorded Investment Impaired Loans	1,569	2,700
Interest Recognized on Impaired Loans	1	1
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	743,984		749,601
Recorded Investment of Loans Individually Measured for Specific Impairment	9,272		11,008
Recorded Investment	593		3,802
Unpaid Principal Balance	592		3,817
Related Allowance	38		1,073
Average Recorded Investment Impaired Loans	10,140	11,620
Interest Recognized on Impaired Loans	241	279
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	39,388		38,916
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,180,523		1,140,019
Recorded Investment of Loans Individually Measured for Specific Impairment	6,459		6,413
Recorded Investment	0		918
Unpaid Principal Balance	0		933
Related Allowance	0		26
Average Recorded Investment Impaired Loans	6,436	8,710
Interest Recognized on Impaired Loans	62	29
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	145,188		142,719
Recorded Investment of Loans Individually Measured for Specific Impairment	107		115
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	111	2,714
Interest Recognized on Impaired Loans	0	0
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	100,762		104,272
Recorded Investment of Loans Individually Measured for Specific Impairment	2,092		1,620
Recorded Investment	437		442
Unpaid Principal Balance	476		479
Related Allowance	133		138
Average Recorded Investment Impaired Loans	1,856	1,816
Interest Recognized on Impaired Loans	13	4
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	72,136		72,569
Recorded Investment of Loans Individually Measured for Specific Impairment	27		35
Recorded Investment	27		35
Unpaid Principal Balance	27		35
Related Allowance	27		35
Average Recorded Investment Impaired Loans	31	88
Interest Recognized on Impaired Loans	0	1
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,516,983		1,478,560
Recorded Investment of Loans Individually Measured for Specific Impairment	7,377		5,087
Recorded Investment	3,202		2,866
Unpaid Principal Balance	3,235		2,885
Related Allowance	1,521		343
Average Recorded Investment Impaired Loans	6,232	4,917
Interest Recognized on Impaired Loans	17	4
Impaired Loans Without Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	22,294		18,190
Unpaid Principal Balance	31,595		26,223
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	4,393		8,199
Unpaid Principal Balance	4,468		8,289
Related Allowance	1,793		1,690
Impaired Loans Without Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	138		144
Unpaid Principal Balance	204		210
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,081		1,831
Unpaid Principal Balance	1,456		2,587
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	8,679		7,206
Unpaid Principal Balance	13,042		10,464
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	6,459		5,495
Unpaid Principal Balance	8,968		7,885
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	107		115
Unpaid Principal Balance	398		398
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,655		1,178
Unpaid Principal Balance	2,812		2,119
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	4,175		2,221
Unpaid Principal Balance	$ 4,715		$ 2,560