Loans, Non-performing Assets (Details) (USD $)	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	$ 26,454,000		$ 17,587,000		$ 17,201,000
Loans past due 90 days or more	3,861,000		4,101,000		5,550,000
Total loans	1,852,324,000		1,741,342,000
Other real estate owned	3,065,000		7,405,000		6,415,000
Total non-performing assets	33,380,000		29,093,000		29,166,000
Number of troubled debt restructured loans, non accrual	8		2
Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total loans	30,315,000		21,688,000		22,751,000
Number of troubled debt restructured loans, non accrual	5
Commercial [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	7,654,000	[1]	6,450,000	[1]	4,212,000	[1]
Total loans	453,444,000		450,411,000
Commercial [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	2,300,000
Commercial mortgage [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	8,894,000	[1]	3,672,000	[1]	3,848,000	[1]
Total loans	614,410,000	[2]	609,487,000	[2]
Commercial mortgage [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	725,000
Construction [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	8,886,000	[1]	4,949,000	[1]	2,321,000	[1]
Total loans	263,726,000		246,611,000
Construction [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	2,600,000
Direct lease financing [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	0		0
Total loans	146,728,000		129,682,000
Residential mortgage [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	93,000		1,264,000		5,260,000
Total loans	97,589,000		96,110,000
Consumer loans and others [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	0		1,252,000
Total loans	276,427,000		209,041,000
Consumer - home equity [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	927,000		0
Consumer [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	927,000		1,252,000		1,560,000
Unallocated [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	$ 0		$ 0

[1] Included in the non-accrual loans as of September 30, 2012 are five troubled debt restructured loans. $725,000 in commercial mortgage, $2.3 million in commercial, and $2.6 million in construction.

[2] At September 30, 2012, our owner occupied loans amounted to $157.2 million, or 25.6% of commercial mortgages as compared to $137.9 million, or 22.6% at December 31, 2011.