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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 70,234	$ 70,571	$ 69,569	$ 72,454
Charged-offs	(5,613)	(8,431)	(12,038)	(14,894)
Recoveries	2,434	5,038	8,315	7,696
Provision for loan and lease losses	2,202	2,117	3,411	4,039
Ending balance	69,257	69,295	69,257	69,295
Specific Reserve	1,358	380	1,358	380
General Allocation	67,899	68,915	67,899	68,915
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	25,761	28,801	25,923	31,027
Charged-offs	(2,022)	(1,642)	(3,408)	(1,840)
Recoveries	200	1,435	712	1,883
Provision for loan and lease losses	3,769	(3,077)	4,481	(5,553)
Ending balance	27,708	25,517	27,708	25,517
Specific Reserve	1,161	128	1,161	128
General Allocation	26,547	25,389	26,547	25,389
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,012	746	927	696
Charged-offs	(64)	(75)	(104)	(110)
Recoveries	9	277	115	319
Provision for loan and lease losses	(100)	(194)	(81)	(151)
Ending balance	857	754	857	754
Specific Reserve	0	19	0	19
General Allocation	857	735	857	735
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,364	1,194	2,281	1,252
Charged-offs	(289)	0	(297)	(207)
Recoveries	15	12	27	40
Provision for loan and lease losses	265	(123)	(656)	(2)
Ending balance	1,355	1,083	1,355	1,083
Specific Reserve	111	128	111	128
General Allocation	1,244	955	1,244	955
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	827	579	799	489
Charged-offs	0	(29)	0	(29)
Recoveries	0	2	0	19
Provision for loan and lease losses	754	(82)	782	(9)
Ending balance	1,581	470	1,581	470
Specific Reserve	0	0	0	0
General Allocation	1,581	470	1,581	470
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,440	10,107	9,159	9,234
Charged-offs	(43)	(1,934)	(43)	(1,934)
Recoveries	7	505	3,259	518
Provision for loan and lease losses	(207)	1,833	(4,178)	2,693
Ending balance	8,197	10,511	8,197	10,511
Specific Reserve	0	0	0	0
General Allocation	8,197	10,511	8,197	10,511
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,612	4,560	5,007	3,605
Charged-offs	0	0	0	(1,023)
Recoveries	13	30	22	39
Provision for loan and lease losses	176	399	772	2,368
Ending balance	5,801	4,989	5,801	4,989
Specific Reserve	20	35	20	35
General Allocation	5,781	4,954	5,781	4,954
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,026	580	1,197	610
Charged-offs	0	0	0	0
Recoveries	1	2	3	41
Provision for loan and lease losses	(530)	(179)	(703)	(248)
Ending balance	497	403	497	403
Specific Reserve	66	69	66	69
General Allocation	431	334	431	334
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,790	696	1,860	822
Charged-offs	0	0	0	0
Recoveries	7	440	33	443
Provision for loan and lease losses	(839)	(459)	(935)	(588)
Ending balance	958	677	958	677
Specific Reserve	0	0	0	0
General Allocation	958	677	958	677
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	827	320	622	285
Charged-offs	0	0	0	0
Recoveries	2	0	5	0
Provision for loan and lease losses	(422)	94	(220)	129
Ending balance	407	414	407	414
Specific Reserve	0	0	0	0
General Allocation	407	414	407	414
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	499	154	434	58
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(58)	12	7	108
Ending balance	441	166	441	166
Specific Reserve	0	0	0	0
General Allocation	441	166	441	166
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,835	2,637	3,180	2,547
Charged-offs	(319)	(909)	(1,210)	(1,636)
Recoveries	137	338	410	591
Provision for loan and lease losses	529	577	802	1,141
Ending balance	3,182	2,643	3,182	2,643
Specific Reserve	0	1	0	1
General Allocation	3,182	2,642	3,182	2,642
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,531	20,129	16,336	20,174
Charged-offs	(2,876)	(3,842)	(6,976)	(8,115)
Recoveries	2,043	1,997	3,729	3,803
Provision for loan and lease losses	476	1,517	3,085	3,939
Ending balance	16,174	19,801	16,174	19,801
Specific Reserve	0	0	0	0
General Allocation	16,174	19,801	16,174	19,801
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,710	68	1,844	1,655
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(1,611)	1,799	255	212
Ending balance	2,099	1,867	2,099	1,867
Specific Reserve	0	0	0	0
General Allocation	$ 2,099	$ 1,867	$ 2,099	$ 1,867