Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	$ 27,043	$ 31,139	$ 27,886	$ 30,873
Charge-offs	(267)	(4,175)	(1,490)	(4,549)
Recoveries	43	220	123	260
Provision	450	700	750	1,300
Allowance, Ending Balance	27,269	27,884	27,269	27,884
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	6,547	9,607	6,969	9,407
Charge-offs	(32)	(4,000)	(977)	(4,114)
Recoveries	6	186	12	192
Provision	452	955	969	1,263
Allowance, Ending Balance	6,973	6,748	6,973	6,748
Commercial Construction and Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	269	246	362	224
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	225	31	132	53
Allowance, Ending Balance	494	277	494	277
Commercial Other [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	5,201	5,966	5,433	5,996
Charge-offs	(115)	(85)	(311)	(178)
Recoveries	20	22	46	44
Provision	348	(461)	286	(420)
Allowance, Ending Balance	5,454	5,442	5,454	5,442
Commercial Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	12,017	15,819	12,764	15,627
Charge-offs	(147)	(4,085)	(1,288)	(4,292)
Recoveries	26	208	58	236
Provision	1,025	525	1,387	896
Allowance, Ending Balance	12,921	12,467	12,921	12,467
Residential Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	5,087	4,533	4,700	4,269
Charge-offs	(30)	(39)	(72)	(48)
Recoveries	0	3	35	3
Provision	(217)	194	177	467
Allowance, Ending Balance	4,840	4,691	4,840	4,691
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	2,565	2,489	2,511	2,684
Charge-offs	(90)	(51)	(130)	(209)
Recoveries	17	9	30	21
Provision	77	8	158	(41)
Allowance, Ending Balance	2,569	2,455	2,569	2,455
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	7,374	8,298	7,911	8,293
Charge-offs
Recoveries
Provision	(435)	(27)	(972)	(22)
Allowance, Ending Balance	$ 6,939	$ 8,271	$ 6,939	$ 8,271