Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Impaired Loans and Leases) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Recorded investment
With no impairment reserve recorded	$ 11,512		$ 18,888
With impairment reserve recorded	4,475		2,989
Total	15,987		21,877
Unpaid principal balance
With no impairment reserve recorded	18,096		26,768
With impairment reserve recorded	5,975		2,989
Total	24,071		29,757
Impairment reserve
Impairment reserve	1,244		888
Average recorded investment
With no impairment reserve recorded	15,496	[1]	31,042	[1]
With impairment reserve recorded	4,287	[1]	2,751	[1]
Total	19,783	[1]	33,793	[1]
Impaired Financing Receivable, Foregone Interest Income	797		2,682
Foregone interest income
With no impairment reserve recorded	718		2,447
With impairment reserve recorded	79		235
Interest income recognized
With no impairment reserve recorded	266		787
With impairment reserve recorded	0		0
Total	266		787
Net foregone interest income
With no impairment reserve recorded	452		1,660
With impairment reserve recorded	79		235
Total	531		1,895
Commercial real estate - owner occupied
Recorded investment
With no impairment reserve recorded	573		2,455
With impairment reserve recorded	396		517
Total	969		2,972
Unpaid principal balance
With no impairment reserve recorded	573		3,669
With impairment reserve recorded	396		517
Total	969		4,186
Impairment reserve
Impairment reserve	13		13
Average recorded investment
With no impairment reserve recorded	2,198	[1]	5,177	[1]
With impairment reserve recorded	404	[1]	358	[1]
Total	2,602	[1]	5,535	[1]
Impaired Financing Receivable, Foregone Interest Income	105		531
Foregone interest income
With no impairment reserve recorded	88		450
With impairment reserve recorded	17		81
Interest income recognized
With no impairment reserve recorded	0		200
With impairment reserve recorded	0		0
Total	0		200
Net foregone interest income
With no impairment reserve recorded	88		250
With impairment reserve recorded	17		81
Total	105		331
Commercial real estate - non-owner occupied
Recorded investment
With no impairment reserve recorded	856		2,249
With impairment reserve recorded	155		0
Total	1,011		2,249
Unpaid principal balance
With no impairment reserve recorded	2,688		4,081
With impairment reserve recorded	155		0
Total	2,843		4,081
Impairment reserve
Impairment reserve	155		0
Average recorded investment
With no impairment reserve recorded	1,304	[1]	5,261	[1]
With impairment reserve recorded	155	[1]	0	[1]
Total	1,459	[1]	5,261	[1]
Impaired Financing Receivable, Foregone Interest Income	126		424
Foregone interest income
With no impairment reserve recorded	124		424
With impairment reserve recorded	2		0
Interest income recognized
With no impairment reserve recorded	154		0
With impairment reserve recorded	0		0
Total	154		0
Net foregone interest income
With no impairment reserve recorded	(30)		424
With impairment reserve recorded	2		0
Total	(28)		424
Construction and land development
Recorded investment
With no impairment reserve recorded	5,408		6,383
With impairment reserve recorded	536		846
Total	5,944		7,229
Unpaid principal balance
With no impairment reserve recorded	8,985		9,927
With impairment reserve recorded	536		846
Total	9,521		10,773
Impairment reserve
Impairment reserve	200		130
Average recorded investment
With no impairment reserve recorded	5,922	[1]	7,974	[1]
With impairment reserve recorded	546	[1]	483	[1]
Total	6,468	[1]	8,457	[1]
Impaired Financing Receivable, Foregone Interest Income	144		398
Foregone interest income
With no impairment reserve recorded	130		350
With impairment reserve recorded	14		48
Interest income recognized
With no impairment reserve recorded	24		48
With impairment reserve recorded	0		0
Total	24		48
Net foregone interest income
With no impairment reserve recorded	106		302
With impairment reserve recorded	14		48
Total	120		350
Multi-family
Recorded investment
With no impairment reserve recorded	51		2,009
With impairment reserve recorded	0		0
Total	51		2,009
Unpaid principal balance
With no impairment reserve recorded	418		2,246
With impairment reserve recorded	0		0
Total	418		2,246
Impairment reserve
Impairment reserve	0		34
Average recorded investment
With no impairment reserve recorded	582	[1]	3,075	[1]
With impairment reserve recorded	0	[1]	287	[1]
Total	582	[1]	3,362	[1]
Impaired Financing Receivable, Foregone Interest Income	46		362
Foregone interest income
With no impairment reserve recorded	46		362
With impairment reserve recorded	0		0
Interest income recognized
With no impairment reserve recorded	60		0
With impairment reserve recorded	0		0
Total	60		0
Net foregone interest income
With no impairment reserve recorded	(14)		362
With impairment reserve recorded	0		0
Total	(14)		362
1-4 family
Recorded investment
With no impairment reserve recorded	1,908		2,628
With impairment reserve recorded	830		989
Total	2,738		3,617
Unpaid principal balance
With no impairment reserve recorded	1,990		3,016
With impairment reserve recorded	830		989
Total	2,820		4,005
Impairment reserve
Impairment reserve	296		337
Average recorded investment
With no impairment reserve recorded	2,203	[1]	3,160	[1]
With impairment reserve recorded	840	[1]	1,017	[1]
Total	3,043	[1]	4,177	[1]
Impaired Financing Receivable, Foregone Interest Income	103		338
Foregone interest income
With no impairment reserve recorded	80		277
With impairment reserve recorded	23		61
Interest income recognized
With no impairment reserve recorded	0		108
With impairment reserve recorded	0		0
Total	0		108
Net foregone interest income
With no impairment reserve recorded	80		169
With impairment reserve recorded	23		61
Total	103		230
Commercial and industrial
Recorded investment
With no impairment reserve recorded	901		1,139
With impairment reserve recorded	2,326		419
Total	3,227		1,558
Unpaid principal balance
With no impairment reserve recorded	1,105		1,320
With impairment reserve recorded	3,826		419
Total	4,931		1,739
Impairment reserve
Impairment reserve	459		276
Average recorded investment
With no impairment reserve recorded	1,372	[1]	3,820	[1]
With impairment reserve recorded	2,101	[1]	384	[1]
Total	3,473	[1]	4,204	[1]
Impaired Financing Receivable, Foregone Interest Income	180		408
Foregone interest income
With no impairment reserve recorded	166		384
With impairment reserve recorded	14		24
Interest income recognized
With no impairment reserve recorded	25		424
With impairment reserve recorded	0		0
Total	25		424
Net foregone interest income
With no impairment reserve recorded	141		(40)
With impairment reserve recorded	14		24
Total	155		(16)
Direct financing leases, net
Recorded investment
With no impairment reserve recorded	0		0
With impairment reserve recorded	0		18
Total	0		18
Unpaid principal balance
With no impairment reserve recorded	0		0
With impairment reserve recorded	0		18
Total	0		18
Impairment reserve
Impairment reserve	0		18
Average recorded investment
With no impairment reserve recorded	8	[1]	0	[1]
With impairment reserve recorded	0	[1]	13	[1]
Total	8	[1]	13	[1]
Impaired Financing Receivable, Foregone Interest Income	0		1
Foregone interest income
With no impairment reserve recorded	0		0
With impairment reserve recorded	0		1
Interest income recognized
With no impairment reserve recorded	1		0
With impairment reserve recorded	0		0
Total	1		0
Net foregone interest income
With no impairment reserve recorded	(1)		0
With impairment reserve recorded	0		1
Total	(1)		1
Home equity loans and second mortage loans
Recorded investment
With no impairment reserve recorded	675		803
With impairment reserve recorded	223		199
Total	898		1,002
Unpaid principal balance
With no impairment reserve recorded	710		827
With impairment reserve recorded	223		199
Total	933		1,026
Impairment reserve
Impairment reserve	112		79
Average recorded investment
With no impairment reserve recorded	738	[1]	884	[1]
With impairment reserve recorded	232	[1]	208	[1]
Total	970	[1]	1,092	[1]
Impaired Financing Receivable, Foregone Interest Income	36		82
Foregone interest income
With no impairment reserve recorded	27		62
With impairment reserve recorded	9		20
Interest income recognized
With no impairment reserve recorded	1		1
With impairment reserve recorded	0		0
Total	1		1
Net foregone interest income
With no impairment reserve recorded	26		61
With impairment reserve recorded	9		20
Total	35		81
Other
Recorded investment
With no impairment reserve recorded	1,140		1,222
With impairment reserve recorded	9		1
Total	1,149		1,223
Unpaid principal balance
With no impairment reserve recorded	1,627		1,682
With impairment reserve recorded	9		1
Total	1,636		1,683
Impairment reserve
Impairment reserve	9		1
Average recorded investment
With no impairment reserve recorded	1,169	[1]	1,691	[1]
With impairment reserve recorded	9	[1]	1	[1]
Total	1,178	[1]	1,692	[1]
Impaired Financing Receivable, Foregone Interest Income	57		138
Foregone interest income
With no impairment reserve recorded	57		138
With impairment reserve recorded	0		0
Interest income recognized
With no impairment reserve recorded	1		6
With impairment reserve recorded	0		0
Total	1		6
Net foregone interest income
With no impairment reserve recorded	56		132
With impairment reserve recorded	0		0
Total	$ 56		$ 132

[1] (1)Average recorded investment is calculated primarily using daily average balances.