Loan Quality (Allowance for Loan Losses, by Loan Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	$ 9,507	$ 9,198	$ 9,723	$ 8,801	$ 8,801
Charge-offs	(754)	(906)	(2,966)	(1,643)	(7,047)
Recoveries	49	91	95	325	445
Provision	825	1,767	2,775	2,667	7,524
ALL, Ending Balance	9,627	10,150	9,627	10,150	9,723
Residential Real Estate First Liens [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	932	612	1,049	600	600
Charge-offs	(144)	(45)	(180)	(152)	(324)
Recoveries		17		28	30
Provision	(11)	(55)	(92)	53	743
ALL, Ending Balance	777	529	777	529	1,049
Residential Real Estate Junior Liens & Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	311	292	308	352	352
Charge-offs		(172)	(65)	(177)	(202)
Recoveries	25	5	25	5	10
Provision	(15)	188	53	133	148
ALL, Ending Balance	321	313	321	313	308
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	878	2,342	1,222	2,596	2,596
Charge-offs		(337)		(737)	(2,352)
Provision	47	387	(297)	533	978
ALL, Ending Balance	925	2,392	925	2,392	1,222
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	5,792	4,216	5,257	3,358	3,358
Charge-offs	(262)	(261)	(2,254)	(422)	(3,817)
Recoveries	1	47	9	240	306
Provision	308	642	2,827	1,468	5,410
ALL, Ending Balance	5,839	4,644	5,839	4,644	5,257
Commercial, industrial and agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	1,388	1,447	1,651	1,578	1,578
Charge-offs	(312)	(41)	(345)	(41)	(115)
Recoveries	5	4	7	4	11
Provision	483	451	251	320	177
ALL, Ending Balance	1,564	1,861	1,564	1,861	1,651
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
ALL, Beginning Balance	206	289	236	317	317
Charge-offs	(36)	(50)	(122)	(114)	(237)
Recoveries	18	18	54	48	88
Provision	13	154	33	160	68
ALL, Ending Balance	$ 201	$ 411	$ 201	$ 411	$ 236