Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Noncovered Loan and Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses			$ 4,039	$ 268
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	50,442	51,119	52,280	52,244
Charged-offs	(4,589)	(2,241)	(6,779)	(4,758)
Recoveries	3,041	820	3,893	3,212
Provision for loan and lease losses	600	2,000	100	1,000
Ending balance	49,494	51,698	49,494	51,698
Specific Reserve	380	839	380	839
General Allocation	49,114	50,859	49,114	50,859
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,637	2,364	2,547	2,437
Charged-offs	(909)	(638)	(1,636)	(809)
Recoveries	338	194	591	241
Provision for loan and lease losses	577	535	1,141	586
Ending balance	2,643	2,455	2,643	2,455
Specific Reserve	1	0	1	0
General Allocation	2,642	2,455	2,642	2,455
Unallocated Financing Receivables [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	68	3,157	1,655	1,011
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	1,799	(2,174)	212	(28)
Ending balance	1,867	983	1,867	983
Specific Reserve	0	0	0	0
General Allocation	1,867	983	1,867	983
Secured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,801	26,871	31,027	27,270
Charged-offs	(1,642)	(856)	(1,840)	(1,844)
Recoveries	1,435	312	1,883	392
Provision for loan and lease losses	(3,077)	4,245	(5,553)	4,754
Ending balance	25,517	30,572	25,517	30,572
Specific Reserve	128	242	128	242
General Allocation	25,389	30,330	25,389	30,330
Unsecured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	746	750	696	753
Charged-offs	(75)	(105)	(110)	(431)
Recoveries	277	40	319	73
Provision for loan and lease losses	(194)	136	(151)	426
Ending balance	754	821	754	821
Specific Reserve	19	51	19	51
General Allocation	735	770	735	770
One-to-Four Family Residential [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,194	657	1,252	694
Charged-offs	0	(28)	(207)	(144)
Recoveries	12	141	40	141
Provision for loan and lease losses	(123)	(98)	(2)	(19)
Ending balance	1,083	672	1,083	672
Specific Reserve	128	105	128	105
General Allocation	955	567	955	567
Commercial Land [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	579	433	489	460
Charged-offs	(29)	(11)	(29)	(11)
Recoveries	2	17	19	27
Provision for loan and lease losses	(82)	252	(9)	215
Ending balance	470	691	470	691
Specific Reserve	0	262	0	262
General Allocation	470	429	470	429
Income Property Multifamily [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,107	9,411	9,234	11,033
Charged-offs	(1,934)	(35)	(1,934)	(818)
Recoveries	505	27	518	106
Provision for loan and lease losses	1,833	292	2,693	(626)
Ending balance	10,511	9,695	10,511	9,695
Specific Reserve	0	76	0	76
General Allocation	10,511	9,619	10,511	9,619
Owner Occupied [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,560	5,458	3,605	6,362
Charged-offs	0	(568)	(1,023)	(568)
Recoveries	30	40	39	44
Provision for loan and lease losses	399	(415)	2,368	(1,323)
Ending balance	4,989	4,515	4,989	4,515
Specific Reserve	35	30	35	30
General Allocation	4,954	4,485	4,954	4,485
Land And Acquisition [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	580	990	610	1,171
Charged-offs	0	0	0	(32)
Recoveries	2	35	41	2,174
Provision for loan and lease losses	(179)	(256)	(248)	(2,544)
Ending balance	403	769	403	769
Specific Reserve	69	73	69	73
General Allocation	334	696	334	696
Residential Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	696	538	822	635
Charged-offs	0	0	0	(101)
Recoveries	440	14	443	14
Provision for loan and lease losses	(459)	(348)	(588)	(344)
Ending balance	677	204	677	204
Specific Reserve	0	0	0	0
General Allocation	677	204	677	204
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	320	382	285	316
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	94	(141)	129	(75)
Ending balance	414	241	414	241
Specific Reserve	0	0	0	0
General Allocation	414	241	414	241
Owner Occupied Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	154	108	58	102
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	12	(28)	108	(22)
Ending balance	166	80	166	80
Specific Reserve	0	0	0	0
General Allocation	$ 166	$ 80	$ 166	$ 80