Loans (Loans By Categories) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Loans by categories [Abstract]
Total loans	$ 1,967,382,000	$ 1,902,854,000	$ 1,804,312,000
Threshold amount of commercial and construction loans and leases subject to loan review	3,000,000
Percentage of loan portfolio review coverage (in hundredths)	69.00%	69.00%
Period of full review in loan committee for loans with relatively short term, minimum	1 year
Period of full review in loan committee for loans with relatively short term, maximum	3 years
Commercial [Member]
Loans by categories [Abstract]
Total loans	481,537,000	470,109,000	441,167,000
Construction [Member]
Loans by categories [Abstract]
Total loans	266,911,000	258,684,000	269,636,000
Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	651,034,000	617,069,000	596,639,000
Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans	93,960,000	97,717,000	97,226,000
Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	295,576,000	296,915,000	255,769,000
Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans	172,250,000	156,697,000	140,012,000
Unallocated [Member]
Loans by categories [Abstract]
Total loans	6,114,000	5,663,000	3,863,000
Pass [Member]
Loans by categories [Abstract]
Total loans	1,246,749,000	1,242,256,000
Pass [Member] | Commercial [Member]
Loans by categories [Abstract]
Total loans	357,519,000	335,563,000
Pass [Member] | Construction [Member]
Loans by categories [Abstract]
Total loans	240,464,000	247,214,000
Pass [Member] | Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	476,681,000	489,615,000
Pass [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans	25,907,000	28,495,000
Pass [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	82,773,000	89,128,000
Pass [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans	63,405,000	52,241,000
Special Mention [Member]
Loans by categories [Abstract]
Total loans	39,338,000	31,262,000
Special Mention [Member] | Commercial [Member]
Loans by categories [Abstract]
Total loans	5,010,000	6,788,000
Special Mention [Member] | Construction [Member]
Loans by categories [Abstract]
Total loans	4,348,000
Special Mention [Member] | Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	28,621,000	23,200,000
Special Mention [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans		1,175,000
Special Mention [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	1,359,000	99,000
Substandard [Member]
Loans by categories [Abstract]
Total loans	67,747,000	30,856,000
Substandard [Member] | Commercial [Member]
Loans by categories [Abstract]
Total loans	33,707,000	12,252,000
Substandard [Member] | Construction [Member]
Loans by categories [Abstract]
Total loans	8,444,000	5,205,000
Substandard [Member] | Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	21,025,000	9,704,000
Substandard [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans	2,016,000
Substandard [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	2,521,000	3,626,000
Substandard [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans	34,000	69,000
Doubtful [Member]
Loans by categories [Abstract]
Total loans		91,000
Doubtful [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans		91,000
Unrated Subject To Review [Member]
Loans by categories [Abstract]
Total loans	112,049,000	46,367,000
Unrated Subject To Review [Member] | Commercial [Member]
Loans by categories [Abstract]
Total loans	34,355,000	17,614,000
Unrated Subject To Review [Member] | Construction [Member]
Loans by categories [Abstract]
Total loans	7,689,000	2,301,000
Unrated Subject To Review [Member] | Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	62,051,000	18,286,000
Unrated Subject To Review [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans	170,000	236,000
Unrated Subject To Review [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	7,784,000	4,593,000
Unrated Subject To Review [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans		3,337,000
Unrated Not Subject To Review [Member]
Loans by categories [Abstract]
Total loans	501,499,000	552,022,000
Unrated Not Subject To Review [Member] | Commercial [Member]
Loans by categories [Abstract]
Total loans	50,946,000	97,892,000
Unrated Not Subject To Review [Member] | Construction [Member]
Loans by categories [Abstract]
Total loans	5,966,000	3,964,000
Unrated Not Subject To Review [Member] | Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	62,656,000	76,264,000
Unrated Not Subject To Review [Member] | Residential Mortgage [Member]
Loans by categories [Abstract]
Total loans	65,867,000	67,720,000
Unrated Not Subject To Review [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	201,139,000	199,469,000
Unrated Not Subject To Review [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans	108,811,000	101,050,000
Unrated Not Subject To Review [Member] | Unallocated [Member]
Loans by categories [Abstract]
Total loans	$ 6,114,000	$ 5,663,000