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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 69,257	$ 69,295	$ 69,569	$ 72,454
Charged-offs	(6,277)	(5,211)	(18,315)	(20,104)
Recoveries	3,238	2,807	11,553	10,502
Provision for loan and lease losses	2,831	980	6,242	5,019
Ending balance	69,049	67,871	69,049	67,871
Specific Reserve	1,199	273	1,199	273
General Allocation	67,850	67,598	67,850	67,598
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	27,708	25,519	25,923	31,027
Charged-offs	(2,439)	(1,348)	(5,847)	(3,188)
Recoveries	530	333	1,242	2,216
Provision for loan and lease losses	5,189	243	9,670	(5,308)
Ending balance	30,988	24,747	30,988	24,747
Specific Reserve	1,020	39	1,020	39
General Allocation	29,968	24,708	29,968	24,708
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	857	754	927	696
Charged-offs	(131)	0	(235)	(110)
Recoveries	93	23	208	342
Provision for loan and lease losses	471	112	390	(39)
Ending balance	1,290	889	1,290	889
Specific Reserve	0	11	0	11
General Allocation	1,290	878	1,290	878
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,355	1,083	2,281	1,252
Charged-offs	0	0	(297)	(207)
Recoveries	261	63	288	103
Provision for loan and lease losses	(420)	230	(1,076)	228
Ending balance	1,196	1,376	1,196	1,376
Specific Reserve	84	124	84	124
General Allocation	1,112	1,252	1,112	1,252
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,581	470	799	489
Charged-offs	0	0	0	(29)
Recoveries	130	51	130	70
Provision for loan and lease losses	123	(124)	905	(133)
Ending balance	1,834	397	1,834	397
Specific Reserve	0	0	0	0
General Allocation	1,834	397	1,834	397
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,197	10,511	9,159	9,234
Charged-offs	(83)	0	(126)	(1,934)
Recoveries	273	83	3,532	601
Provision for loan and lease losses	22	(784)	(4,156)	1,909
Ending balance	8,409	9,810	8,409	9,810
Specific Reserve	0	0	0	0
General Allocation	8,409	9,810	8,409	9,810
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,801	4,990	5,007	3,605
Charged-offs	(115)	(7)	(115)	(1,030)
Recoveries	14	5	36	44
Provision for loan and lease losses	473	(193)	1,245	2,176
Ending balance	6,173	4,795	6,173	4,795
Specific Reserve	17	31	17	31
General Allocation	6,156	4,764	6,156	4,764
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	497	403	1,197	610
Charged-offs	0	0	0	0
Recoveries	98	3	101	44
Provision for loan and lease losses	(206)	876	(909)	628
Ending balance	389	1,282	389	1,282
Specific Reserve	64	68	64	68
General Allocation	325	1,214	325	1,214
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	958	677	1,860	822
Charged-offs	0	0	0	0
Recoveries	7	18	40	461
Provision for loan and lease losses	(250)	1,103	(1,185)	515
Ending balance	715	1,798	715	1,798
Specific Reserve	0	0	0	0
General Allocation	715	1,798	715	1,798
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	407	414	622	285
Charged-offs	0	0	0	0
Recoveries	2	0	7	0
Provision for loan and lease losses	(68)	535	(288)	664
Ending balance	341	949	341	949
Specific Reserve	0	0	0	0
General Allocation	341	949	341	949
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	441	166	434	58
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(31)	168	(24)	276
Ending balance	410	334	410	334
Specific Reserve	0	0	0	0
General Allocation	410	334	410	334
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,182	2,643	3,180	2,547
Charged-offs	(311)	(620)	(1,521)	(2,256)
Recoveries	297	340	707	931
Provision for loan and lease losses	49	502	851	1,643
Ending balance	3,217	2,865	3,217	2,865
Specific Reserve	14	0	14	0
General Allocation	3,203	2,865	3,203	2,865
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,174	19,801	16,336	20,174
Charged-offs	(3,198)	(3,236)	(10,174)	(11,350)
Recoveries	1,533	1,888	5,262	5,690
Provision for loan and lease losses	(519)	(520)	2,566	3,419
Ending balance	13,990	17,933	13,990	17,933
Specific Reserve	0	0	0	0
General Allocation	13,990	17,933	13,990	17,933
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,099	1,864	1,844	1,655
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(2,002)	(1,168)	(1,747)	(959)
Ending balance	97	696	97	696
Specific Reserve	0	0	0	0
General Allocation	$ 97	$ 696	$ 97	$ 696