Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		$ 26,488	$ 26,004	$ 27,069
Charge-offs		(1,187)	(2,462)	(7,012)
Recoveries		221	346	297
Provision		1,550	2,600	5,650
Ending Balance		27,072	26,488	26,004
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]	12,729	11,166	10,898
Charge-offs	[1]	(627)	(1,867)	(5,816)
Recoveries	[1]	25	82	56
Provision	[1]	3,254	3,348	6,028
Ending Balance	[1]	15,381	12,729	11,166
Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[2]	5,580	6,992	8,202
Charge-offs	[2]	(10)	(336)	(759)
Recoveries	[2]	119	169	156
Provision	[2]	158	(1,245)	(607)
Ending Balance	[2]	5,847	5,580	6,992
Total Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		18,309	18,158	19,100
Charge-offs		(637)	(2,203)	(6,575)
Recoveries		144	251	212
Provision		3,412	2,103	5,421
Ending Balance		21,228	18,309	18,158
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		5,427	5,252	5,460
Charge-offs		(250)	(74)	(200)
Recoveries		21	39	11
Provision		(1,211)	210	(19)
Ending Balance		3,987	5,427	5,252
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		2,412	1,889	1,915
Charge-offs		(193)	(79)	(147)
Recoveries		29	33	37
Provision		(645)	569	84
Ending Balance		1,603	2,412	1,889
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		340	705	594
Charge-offs		(107)	(106)	(90)
Recoveries		27	23	37
Provision		(6)	(282)	164
Ending Balance		254	340	705
Total Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		2,752	2,594	2,509
Charge-offs		(300)	(185)	(237)
Recoveries		56	56	74
Provision		(651)	287	248
Ending Balance		$ 1,857	$ 2,752	$ 2,594

[1] Commercial real estate loans.

[2] Commercial & industrial loans.