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
	Mar. 31, 2014	Mar. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	$ 1,922	$ (20)
Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	52,280	52,244
Charged-offs	(2,190)	(2,517)
Recoveries	852	2,392
Provision for loan and lease losses	(500)	(1,000)
Ending balance	50,442	51,119
Specific Reserve	1,793	385
General Allocation	48,649	50,734
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,547	2,437
Charged-offs	(727)	(171)
Recoveries	253	47
Provision for loan and lease losses	564	51
Ending balance	2,637	2,364
Specific Reserve	3	0
General Allocation	2,634	2,364
Unallocated Financing Receivables [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,655	1,011
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(1,587)	2,146
Ending balance	68	3,157
Specific Reserve	0	0
General Allocation	68	3,157
Secured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	31,027	27,270
Charged-offs	(198)	(988)
Recoveries	448	79
Provision for loan and lease losses	(2,476)	510
Ending balance	28,801	26,871
Specific Reserve	1,521	67
General Allocation	27,280	26,804
Unsecured Loans [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	696	753
Charged-offs	(35)	(326)
Recoveries	42	34
Provision for loan and lease losses	43	289
Ending balance	746	750
Specific Reserve	27	84
General Allocation	719	666
One-to-Four Family Residential [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,252	694
Charged-offs	(207)	(116)
Recoveries	28	0
Provision for loan and lease losses	121	79
Ending balance	1,194	657
Specific Reserve	133	108
General Allocation	1,061	549
Commercial Land [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	489	460
Charged-offs	0	0
Recoveries	17	10
Provision for loan and lease losses	73	(37)
Ending balance	579	433
Specific Reserve	0	0
General Allocation	579	433
Income Property Multifamily [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,234	11,033
Charged-offs	0	(783)
Recoveries	13	79
Provision for loan and lease losses	860	(918)
Ending balance	10,107	9,411
Specific Reserve	0	18
General Allocation	10,107	9,393
Owner Occupied [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,605	6,362
Charged-offs	(1,023)	0
Recoveries	9	4
Provision for loan and lease losses	1,969	(908)
Ending balance	4,560	5,458
Specific Reserve	38	34
General Allocation	4,522	5,424
Land And Acquisition [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	610	1,171
Charged-offs	0	(32)
Recoveries	39	2,139
Provision for loan and lease losses	(69)	(2,288)
Ending balance	580	990
Specific Reserve	71	74
General Allocation	509	916
Residential Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	822	635
Charged-offs	0	(101)
Recoveries	3	0
Provision for loan and lease losses	(129)	4
Ending balance	696	538
Specific Reserve	0	0
General Allocation	696	538
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	285	316
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	35	66
Ending balance	320	382
Specific Reserve	0	0
General Allocation	320	382
Owner Occupied Construction [Member] | Noncovered Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	58	102
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	96	6
Ending balance	154	108
Specific Reserve	0	0
General Allocation	$ 154	$ 108