Loans, Non-performing Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	$ 24,815		$ 17,587
Total loans	1,800,449		1,741,342
Other real estate owned	4,919		7,405		3,764
Total non-performing assets	32,839		29,093		27,687
Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	24,815		17,587		19,526
Loans past due 90 days or more	3,105		4,101		4,397
Total loans	27,920		21,688		23,923
Commercial [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	9,536		6,450
Total loans	441,167		450,411
Commercial [Member] | Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	9,536	[1]	6,450	[1]	5,337	[1]
Commercial [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	3,200
Commercial mortgage [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	5,559		3,672
Total loans	596,639	[2]	609,487	[2]
Commercial mortgage [Member] | Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	5,559	[1]	3,672	[1]	2,782	[1]
Commercial mortgage [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	737
Construction [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	8,698		4,949
Total loans	269,636		246,611
Construction [Member] | Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	8,698	[1]	4,949	[1]	845	[1]
Construction [Member] | Troubled debt restructuring [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	3,400
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	140,012		129,682
Residential mortgage [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	95		1,264
Total loans	97,226		96,110
Residential mortgage [Member] | Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	95		1,264		9,929
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
Consumer - home equity [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	927		0
Consumer [Member] | Non-performing loans [Member]
Summarize non-accrual loans, loans past due and other real estate owned [Abstract]
Total non-accrual loans	927		1,252		633
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 June 30, 2012 are five troubled debt restructured loans: $3.4 million in construction, $737,000 in commercial mortgage and $3.2 million in commercial.

[2] At June 30, 2012, our owner occupied loans amounted to $141.9 million, or 23. 8% of commercial mortgages as compared to $137.9 million, or 22.6% at December 31, 2011.