Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Loan and Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 69,569		$ 72,454
Charged-offs	(6,425)		(6,463)
Recoveries	5,881		2,658
Provision for loan and lease losses	1,209	[1]	1,922	[1]
Ending balance	70,234		70,571
Specific Reserve	230		1,793
General Allocation	70,004		68,778
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	25,923		31,027
Charged-offs	(1,386)		(198)
Recoveries	512		448
Provision for loan and lease losses	712		(2,476)
Ending balance	25,761		28,801
Specific Reserve	24		1,521
General Allocation	25,737		27,280
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	927		696
Charged-offs	(40)		(35)
Recoveries	106		42
Provision for loan and lease losses	19		43
Ending balance	1,012		746
Specific Reserve	0		27
General Allocation	1,012		719
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,281		1,252
Charged-offs	(8)		(207)
Recoveries	12		28
Provision for loan and lease losses	(921)		121
Ending balance	1,364		1,194
Specific Reserve	115		133
General Allocation	1,249		1,061
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	799		489
Charged-offs	0		0
Recoveries	0		17
Provision for loan and lease losses	28		73
Ending balance	827		579
Specific Reserve	0		0
General Allocation	827		579
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,159		9,234
Charged-offs	0		0
Recoveries	3,252		13
Provision for loan and lease losses	(3,971)		860
Ending balance	8,440		10,107
Specific Reserve	0		0
General Allocation	8,440		10,107
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,007		3,605
Charged-offs	0		(1,023)
Recoveries	9		9
Provision for loan and lease losses	596		1,969
Ending balance	5,612		4,560
Specific Reserve	24		38
General Allocation	5,588		4,522
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,197		610
Charged-offs	0		0
Recoveries	2		39
Provision for loan and lease losses	(173)		(69)
Ending balance	1,026		580
Specific Reserve	67		71
General Allocation	959		509
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,860		822
Charged-offs	0		0
Recoveries	26		3
Provision for loan and lease losses	(96)		(129)
Ending balance	1,790		696
Specific Reserve	0		0
General Allocation	1,790		696
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	622		285
Charged-offs	0		0
Recoveries	3		0
Provision for loan and lease losses	202		35
Ending balance	827		320
Specific Reserve	0		0
General Allocation	827		320
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	434		58
Charged-offs	0		0
Recoveries	0		0
Provision for loan and lease losses	65		96
Ending balance	499		154
Specific Reserve	0		0
General Allocation	499		154
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,180		2,547
Charged-offs	(891)		(727)
Recoveries	273		253
Provision for loan and lease losses	273		564
Ending balance	2,835		2,637
Specific Reserve	0		3
General Allocation	2,835		2,634
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,336		20,174
Charged-offs	(4,100)		(4,273)
Recoveries	1,686		1,806
Provision for loan and lease losses	2,609		2,422
Ending balance	16,531		20,129
Specific Reserve	0		0
General Allocation	16,531		20,129
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,844		1,655
Charged-offs	0		0
Recoveries	0		0
Provision for loan and lease losses	1,866		(1,587)
Ending balance	3,710		68
Specific Reserve	0		0
General Allocation	$ 3,710		$ 68

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