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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses			$ 3,581	$ 34,506
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	51,698	52,196	52,244	53,041
Charged-offs	(1,912)	(5,241)	(6,670)	(17,272)
Recoveries	1,798	1,697	5,010	4,633
Provision for loan and lease losses	4,260	2,875	5,260	11,125
Ending balance	55,844	51,527	55,844	51,527
Specific Reserve	486	730	486	730
General Allocation	55,358	50,797	55,358	50,797
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,455	2,049	2,437	2,719
Charged-offs	(453)	(500)	(1,262)	(1,968)
Recoveries	112	350	353	809
Provision for loan and lease losses	405	267	991	606
Ending balance	2,519	2,166	2,519	2,166
Specific Reserve	0	0	0	0
General Allocation	2,519	2,166	2,519	2,166
Unallocated Financing Receivables [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	983	493	1,011	694
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(983)	682	(1,011)	481
Ending balance	0	1,175	0	1,175
Specific Reserve	0	0	0	0
General Allocation	0	1,175	0	1,175
Secured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	30,572	26,505	27,270	24,745
Charged-offs	(392)	(3,744)	(2,236)	(8,126)
Recoveries	743	194	1,135	1,184
Provision for loan and lease losses	3,187	3,007	7,941	8,159
Ending balance	34,110	25,962	34,110	25,962
Specific Reserve	241	315	241	315
General Allocation	33,869	25,647	33,869	25,647
Unsecured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	821	772	753	689
Charged-offs	(363)	(31)	(794)	(52)
Recoveries	111	83	184	130
Provision for loan and lease losses	491	(56)	917	1
Ending balance	1,060	768	1,060	768
Specific Reserve	43	100	43	100
General Allocation	1,017	668	1,017	668
One-to-Four Family Residential [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	672	673	694	654
Charged-offs	(47)	(49)	(191)	(499)
Recoveries	39	157	180	202
Provision for loan and lease losses	677	(216)	658	208
Ending balance	1,341	565	1,341	565
Specific Reserve	103	69	103	69
General Allocation	1,238	496	1,238	496
Commercial Land [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	691	270	460	488
Charged-offs	(9)	(55)	(20)	(437)
Recoveries	126	0	153	0
Provision for loan and lease losses	(260)	207	(45)	371
Ending balance	548	422	548	422
Specific Reserve	0	1	0	1
General Allocation	548	421	548	421
Income Property Multifamily [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,695	8,726	11,033	9,551
Charged-offs	(132)	(436)	(950)	(3,959)
Recoveries	154	357	260	710
Provision for loan and lease losses	85	387	(541)	2,732
Ending balance	9,802	9,034	9,802	9,034
Specific Reserve	0	0	0	0
General Allocation	9,802	9,034	9,802	9,034
Owner Occupied [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,515	9,037	6,362	9,606
Charged-offs	(516)	(101)	(1,084)	(712)
Recoveries	52	89	96	628
Provision for loan and lease losses	637	(694)	(686)	(1,191)
Ending balance	4,688	8,331	4,688	8,331
Specific Reserve	26	245	26	245
General Allocation	4,662	8,086	4,662	8,086
Land And Acquisition [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	769	1,651	1,171	2,331
Charged-offs	0	(307)	(32)	(809)
Recoveries	366	404	2,541	827
Provision for loan and lease losses	(410)	(279)	(2,955)	(880)
Ending balance	725	1,469	725	1,469
Specific Reserve	73	0	73	0
General Allocation	652	1,469	652	1,469
Residential Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	204	1,197	635	864
Charged-offs	0	(18)	(101)	(617)
Recoveries	95	0	108	79
Provision for loan and lease losses	426	3	83	856
Ending balance	725	1,182	725	1,182
Specific Reserve	0	0	0	0
General Allocation	725	1,182	725	1,182
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	241	755	316	665
Charged-offs	0	0	0	(93)
Recoveries	0	63	0	64
Provision for loan and lease losses	17	(456)	(58)	(274)
Ending balance	258	362	258	362
Specific Reserve	0	0	0	0
General Allocation	258	362	258	362
Owner Occupied Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	80	68	102	35
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(12)	23	(34)	56
Ending balance	68	91	68	91
Specific Reserve	0	0	0	0
General Allocation	$ 68	$ 91	$ 68	$ 91