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, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses			$ 5,019	$ 3,581
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	49,494	51,698	52,280	52,244
Charged-offs	(1,975)	(1,912)	(8,754)	(6,670)
Recoveries	919	1,798	4,812	5,010
Provision for loan and lease losses	1,500	4,260	1,600	5,260
Ending balance	49,938	55,844	49,938	55,844
Specific Reserve	273	486	273	486
General Allocation	49,665	55,358	49,665	55,358
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,643	2,455	2,547	2,437
Charged-offs	(620)	(453)	(2,256)	(1,262)
Recoveries	340	112	931	353
Provision for loan and lease losses	502	405	1,643	991
Ending balance	2,865	2,519	2,865	2,519
Specific Reserve	0	0	0	0
General Allocation	2,865	2,519	2,865	2,519
Unallocated Financing Receivables [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,864	983	1,655	1,011
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(1,168)	(983)	(959)	(1,011)
Ending balance	696	0	696	0
Specific Reserve	0	0	0	0
General Allocation	696	0	696	0
Secured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	25,519	30,572	31,027	27,270
Charged-offs	(1,348)	(392)	(3,188)	(2,236)
Recoveries	333	743	2,216	1,135
Provision for loan and lease losses	243	3,187	(5,308)	7,941
Ending balance	24,747	34,110	24,747	34,110
Specific Reserve	39	241	39	241
General Allocation	24,708	33,869	24,708	33,869
Unsecured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	754	821	696	753
Charged-offs	0	(363)	(110)	(794)
Recoveries	23	111	342	184
Provision for loan and lease losses	112	491	(39)	917
Ending balance	889	1,060	889	1,060
Specific Reserve	11	43	11	43
General Allocation	878	1,017	878	1,017
One-to-Four Family Residential [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,083	672	1,252	694
Charged-offs	0	(47)	(207)	(191)
Recoveries	63	39	103	180
Provision for loan and lease losses	230	677	228	658
Ending balance	1,376	1,341	1,376	1,341
Specific Reserve	124	103	124	103
General Allocation	1,252	1,238	1,252	1,238
Commercial Land [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	470	691	489	460
Charged-offs	0	(9)	(29)	(20)
Recoveries	51	126	70	153
Provision for loan and lease losses	(124)	(260)	(133)	(45)
Ending balance	397	548	397	548
Specific Reserve	0	0	0	0
General Allocation	397	548	397	548
Income Property Multifamily [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,511	9,695	9,234	11,033
Charged-offs	0	(132)	(1,934)	(950)
Recoveries	83	154	601	260
Provision for loan and lease losses	(784)	85	1,909	(541)
Ending balance	9,810	9,802	9,810	9,802
Specific Reserve	0	0	0	0
General Allocation	9,810	9,802	9,810	9,802
Owner Occupied [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,990	4,515	3,605	6,362
Charged-offs	(7)	(516)	(1,030)	(1,084)
Recoveries	5	52	44	96
Provision for loan and lease losses	(193)	637	2,176	(686)
Ending balance	4,795	4,688	4,795	4,688
Specific Reserve	31	26	31	26
General Allocation	4,764	4,662	4,764	4,662
Land And Acquisition [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	403	769	610	1,171
Charged-offs	0	0	0	(32)
Recoveries	3	366	44	2,541
Provision for loan and lease losses	876	(410)	628	(2,955)
Ending balance	1,282	725	1,282	725
Specific Reserve	68	73	68	73
General Allocation	1,214	652	1,214	652
Residential Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	677	204	822	635
Charged-offs	0	0	0	(101)
Recoveries	18	95	461	108
Provision for loan and lease losses	1,103	426	515	83
Ending balance	1,798	725	1,798	725
Specific Reserve	0	0	0	0
General Allocation	1,798	725	1,798	725
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	414	241	285	316
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	535	17	664	(58)
Ending balance	949	258	949	258
Specific Reserve	0	0	0	0
General Allocation	949	258	949	258
Owner Occupied Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	166	80	58	102
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	168	(12)	276	(34)
Ending balance	334	68	334	68
Specific Reserve	0	0	0	0
General Allocation	$ 334	$ 68	$ 334	$ 68