Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 69,264	$ 70,234	$ 68,172	$ 69,569
Charged-offs	(6,234)	(5,613)	(13,139)	(12,038)
Recoveries	2,634	2,434	5,377	8,315
Provision for loan and lease losses	3,640	2,202	8,894	3,411
Ending balance	69,304	69,257	69,304	69,257
Specific Reserve	2,705	1,358	2,705	1,358
General Allocation	66,599	67,899	66,599	67,899
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	32,114	25,761	32,321	25,923
Charged-offs	(2,900)	(2,022)	(6,670)	(3,408)
Recoveries	728	200	1,339	712
Provision for loan and lease losses	1,866	3,769	4,818	4,481
Ending balance	31,808	27,708	31,808	27,708
Specific Reserve	2,486	1,161	2,486	1,161
General Allocation	29,322	26,547	29,322	26,547
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,300	1,012	1,299	927
Charged-offs	(41)	(64)	(44)	(104)
Recoveries	25	9	76	115
Provision for loan and lease losses	(19)	(100)	(66)	(81)
Ending balance	1,265	857	1,265	857
Specific Reserve	0	0	0	0
General Allocation	1,265	857	1,265	857
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	654	1,364	916	2,281
Charged-offs	(35)	(289)	(35)	(297)
Recoveries	20	15	61	27
Provision for loan and lease losses	35	265	(268)	(656)
Ending balance	674	1,355	674	1,355
Specific Reserve	1	111	1	111
General Allocation	673	1,244	673	1,244
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,262	827	1,178	799
Charged-offs	(26)	0	(26)	0
Recoveries	2	0	2	0
Provision for loan and lease losses	184	754	268	782
Ending balance	1,422	1,581	1,422	1,581
Specific Reserve	0	0	0	0
General Allocation	1,422	1,581	1,422	1,581
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,402	8,440	6,616	9,159
Charged-offs	0	(43)	0	(43)
Recoveries	120	7	181	3,259
Provision for loan and lease losses	524	(207)	1,249	(4,178)
Ending balance	8,046	8,197	8,046	8,197
Specific Reserve	100	0	100	0
General Allocation	7,946	8,197	7,946	8,197
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,086	5,612	5,550	5,007
Charged-offs	0	0	0	0
Recoveries	8	13	16	22
Provision for loan and lease losses	242	176	770	772
Ending balance	6,336	5,801	6,336	5,801
Specific Reserve	0	20	0	20
General Allocation	6,336	5,781	6,336	5,781
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	640	1,026	339	1,197
Charged-offs	0	0	0	0
Recoveries	2	1	53	3
Provision for loan and lease losses	(55)	(530)	195	(703)
Ending balance	587	497	587	497
Specific Reserve	0	66	0	66
General Allocation	587	431	587	431
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,449	1,790	733	1,860
Charged-offs	0	0	0	0
Recoveries	3	7	206	33
Provision for loan and lease losses	(76)	(839)	437	(935)
Ending balance	1,376	958	1,376	958
Specific Reserve	0	0	0	0
General Allocation	1,376	958	1,376	958
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	715	827	388	622
Charged-offs	0	0	0	0
Recoveries	1	2	2	5
Provision for loan and lease losses	188	(422)	514	(220)
Ending balance	904	407	904	407
Specific Reserve	0	0	0	0
General Allocation	904	407	904	407
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,210	499	1,006	434
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	174	(58)	378	7
Ending balance	1,384	441	1,384	441
Specific Reserve	0	0	0	0
General Allocation	1,384	441	1,384	441
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,368	2,835	3,531	3,180
Charged-offs	(334)	(319)	(600)	(1,210)
Recoveries	201	137	366	410
Provision for loan and lease losses	325	529	263	802
Ending balance	3,560	3,182	3,560	3,182
Specific Reserve	118	0	118	0
General Allocation	3,442	3,182	3,442	3,182
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,064	16,531	13,726	16,336
Charged-offs	(2,898)	(2,876)	(5,764)	(6,976)
Recoveries	1,524	2,043	3,075	3,729
Provision for loan and lease losses	91	476	744	3,085
Ending balance	11,781	16,174	11,781	16,174
Specific Reserve	0	0	0	0
General Allocation	11,781	16,174	11,781	16,174
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	3,710	569	1,844
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	161	(1,611)	(408)	255
Ending balance	161	2,099	161	2,099
Specific Reserve	0	0	0	0
General Allocation	$ 161	$ 2,099	$ 161	$ 2,099