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
	Mar. 31, 2016	Mar. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 68,172	$ 69,569
Charged-offs	(6,905)	(6,425)
Recoveries	2,743	5,881
Provision for loan and lease losses	5,254	1,209
Ending balance	69,264	70,234
Specific Reserve	2,515	230
General Allocation	66,749	70,004
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	32,321	25,923
Charged-offs	(3,770)	(1,386)
Recoveries	611	512
Provision for loan and lease losses	2,952	712
Ending balance	32,114	25,761
Specific Reserve	2,500	24
General Allocation	29,614	25,737
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,299	927
Charged-offs	(3)	(40)
Recoveries	51	106
Provision for loan and lease losses	(47)	19
Ending balance	1,300	1,012
Specific Reserve	0	0
General Allocation	1,300	1,012
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	916	2,281
Charged-offs	0	(8)
Recoveries	41	12
Provision for loan and lease losses	(303)	(921)
Ending balance	654	1,364
Specific Reserve	0	115
General Allocation	654	1,249
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,178	799
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	84	28
Ending balance	1,262	827
Specific Reserve	0	0
General Allocation	1,262	827
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,616	9,159
Charged-offs	0	0
Recoveries	61	3,252
Provision for loan and lease losses	725	(3,971)
Ending balance	7,402	8,440
Specific Reserve	0	0
General Allocation	7,402	8,440
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,550	5,007
Charged-offs	0	0
Recoveries	8	9
Provision for loan and lease losses	528	596
Ending balance	6,086	5,612
Specific Reserve	0	24
General Allocation	6,086	5,588
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	339	1,197
Charged-offs	0	0
Recoveries	51	2
Provision for loan and lease losses	250	(173)
Ending balance	640	1,026
Specific Reserve	0	67
General Allocation	640	959
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	733	1,860
Charged-offs	0	0
Recoveries	203	26
Provision for loan and lease losses	513	(96)
Ending balance	1,449	1,790
Specific Reserve	0	0
General Allocation	1,449	1,790
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	388	622
Charged-offs	0	0
Recoveries	1	3
Provision for loan and lease losses	326	202
Ending balance	715	827
Specific Reserve	0	0
General Allocation	715	827
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,006	434
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	204	65
Ending balance	1,210	499
Specific Reserve	0	0
General Allocation	1,210	499
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,531	3,180
Charged-offs	(266)	(891)
Recoveries	165	273
Provision for loan and lease losses	(62)	273
Ending balance	3,368	2,835
Specific Reserve	15	0
General Allocation	3,353	2,835
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,726	16,336
Charged-offs	(2,866)	(4,100)
Recoveries	1,551	1,686
Provision for loan and lease losses	653	2,609
Ending balance	13,064	16,531
Specific Reserve	0	0
General Allocation	13,064	16,531
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	569	1,844
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(569)	1,866
Ending balance	0	3,710
Specific Reserve	0	0
General Allocation	$ 0	$ 3,710