Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	$ 27,886	$ 30,873
Charge-offs	(1,223)	(374)
Recoveries	80	40
Provision	300	600
Allowance, Ending Balance	27,043	31,139
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	6,969	9,407
Charge-offs	(945)	(114)
Recoveries	6	6
Provision	517	308
Allowance, Ending Balance	6,547	9,607
Commercial Construction and Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	362	224
Charge-offs	0	0
Recoveries	0	0
Provision	(93)	22
Allowance, Ending Balance	269	246
Commercial Other [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	5,433	5,996
Charge-offs	(196)	(93)
Recoveries	26	22
Provision	(62)	41
Allowance, Ending Balance	5,201	5,966
Commercial Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	12,764	15,627
Charge-offs	(1,141)	(207)
Recoveries	32	28
Provision	362	371
Allowance, Ending Balance	12,017	15,819
Residential Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	4,700	4,269
Charge-offs	(42)	(9)
Recoveries	35	0
Provision	394	273
Allowance, Ending Balance	5,087	4,533
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	2,511	2,684
Charge-offs	(40)	(158)
Recoveries	13	12
Provision	81	(49)
Allowance, Ending Balance	2,565	2,489
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	7,911	8,293
Charge-offs
Recoveries
Provision	(537)	5
Allowance, Ending Balance	$ 7,374	$ 8,298