Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 30,873	$ 29,802	$ 28,583
Charge-offs	(6,022)	(2,335)	(3,834)
Recoveries	635	706	353
Provision	2,400	2,700	4,700
Ending Balance	27,886	30,873	29,802
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	9,407	8,195	7,330
Charge-offs	(5,213)	(485)	(960)
Recoveries	380	442	7
Provision	2,395	1,255	1,818
Ending Balance	6,969	9,407	8,195
Commercial Construction and Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	224	95	723
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	138	129	(628)
Ending Balance	362	224	95
Commercial Other [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	5,996	6,200	6,495
Charge-offs	(358)	(1,179)	(1,685)
Recoveries	153	103	311
Provision	(358)	872	1,079
Ending Balance	5,433	5,996	6,200
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	15,627	14,490	14,548
Charge-offs	(5,571)	(1,664)	(2,645)
Recoveries	533	545	318
Provision	2,175	2,256	2,269
Ending Balance	12,764	15,627	14,490
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,269	4,694	4,129
Charge-offs	(128)	(367)	(641)
Recoveries	3	110	4
Provision	556	(168)	1,202
Ending Balance	4,700	4,269	4,694
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	2,684	2,452	1,903
Charge-offs	(323)	(304)	(548)
Recoveries	99	51	31
Provision	51	485	1,066
Ending Balance	2,511	2,684	2,452
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	8,293	8,166	8,003
Charge-offs
Recoveries
Provision	(382)	127	163
Ending Balance	$ 7,911	$ 8,293	$ 8,166