Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Allowance for Loan and Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for credit losses:
Beginning balance	$ 14,155	$ 16,271
Charge-offs	(2,070)	(3,884)
Recoveries	184	672
Provision	2,549	2,878
Ending balance	14,818	15,937
Ending balance: individually evaluated for impairment	1,244	3,009
Ending balance: collectively evaluated for impairment	13,574	12,928
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans and leases receivable:
Total gross loans and leases receivable	863,175	861,379	851,546
Ending balance: individually evaluated for impairment	15,987	34,624
Ending balance: collectively evaluated for impairment	847,188	826,755
Ending balance: loans acquired with deteriorated credit quality	0	0
Allowance as % of gross loans	1.72%	1.85%	1.66%
Commercial real estate
Allowance for credit losses:
Beginning balance	9,554	11,267
Charge-offs	(447)	(3,538)
Recoveries	106	216
Provision	784	3,111
Ending balance	9,997	11,056
Ending balance: individually evaluated for impairment	677	2,099
Ending balance: collectively evaluated for impairment	9,320	8,957
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans and leases receivable:
Total gross loans and leases receivable	588,914	614,670
Ending balance: individually evaluated for impairment	10,713	27,310
Ending balance: collectively evaluated for impairment	578,201	587,360
Ending balance: loans acquired with deteriorated credit quality	0	0
Allowance as % of gross loans	1.70%	1.80%
Commercial and industrial
Allowance for credit losses:
Beginning balance	3,977	4,277
Charge-offs	(1,529)	(198)
Recoveries	64	376
Provision	1,675	(274)
Ending balance	4,187	4,181
Ending balance: individually evaluated for impairment	459	757
Ending balance: collectively evaluated for impairment	3,728	3,424
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans and leases receivable:
Total gross loans and leases receivable	241,130	212,326
Ending balance: individually evaluated for impairment	3,227	4,483
Ending balance: collectively evaluated for impairment	237,903	207,843
Ending balance: loans acquired with deteriorated credit quality	0	0
Allowance as % of gross loans	1.74%	1.97%
Consumer and other
Allowance for credit losses:
Beginning balance	384	482
Charge-offs	(94)	(148)
Recoveries	14	61
Provision	121	63
Ending balance	425	458
Ending balance: individually evaluated for impairment	108	121
Ending balance: collectively evaluated for impairment	317	337
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans and leases receivable:
Total gross loans and leases receivable	17,119	18,425
Ending balance: individually evaluated for impairment	2,047	2,799
Ending balance: collectively evaluated for impairment	15,072	15,626
Ending balance: loans acquired with deteriorated credit quality	0	0
Allowance as % of gross loans	2.48%	2.49%
Direct financing leases, net
Allowance for credit losses:
Beginning balance	240	245
Charge-offs	0	0
Recoveries	0	19
Provision	(31)	(22)
Ending balance	209	242
Ending balance: individually evaluated for impairment	0	32
Ending balance: collectively evaluated for impairment	209	210
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans and leases receivable:
Total gross loans and leases receivable	16,012	15,958
Ending balance: individually evaluated for impairment	0	32
Ending balance: collectively evaluated for impairment	16,012	15,926
Ending balance: loans acquired with deteriorated credit quality	$ 0	$ 0
Allowance as % of gross loans	1.31%	1.52%