Allowance for Loan Losses (Allowance for Loan Losses by Segment & Impairment Methodology) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 22,369		$ 37,493
Loans related allowance individually evaluated for impairment	1,444		1,481
Loans collectively evaluated for impairment	2,651,678		2,425,391
Loans related allowance collectively evaluated for impairment	19,607		18,494
Total loans	2,674,047	[1]	2,462,884	[1]
Allowance	27,768		27,886
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	15,701		30,292
Loans related allowance individually evaluated for impairment	927		552
Loans collectively evaluated for impairment	751,002		765,957
Loans related allowance collectively evaluated for impairment	6,186		6,417
Total loans	766,703		796,249
Commercial Construction and Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	0		0
Loans related allowance individually evaluated for impairment	0		0
Loans collectively evaluated for impairment	58,750		36,289
Loans related allowance collectively evaluated for impairment	700		362
Total loans	58,750		36,289
Commercial Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	2,361		2,556
Loans related allowance individually evaluated for impairment	207		463
Loans collectively evaluated for impairment	562,559		528,241
Loans related allowance collectively evaluated for impairment	5,346		4,970
Total loans	564,920		530,797
Residential Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	4,037		4,290
Loans related allowance individually evaluated for impairment	256		463
Loans collectively evaluated for impairment	941,543		768,384
Loans related allowance collectively evaluated for impairment	4,679		4,237
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	270		355
Loans related allowance individually evaluated for impairment	54		3
Loans collectively evaluated for impairment	337,824		326,520
Loans related allowance collectively evaluated for impairment	2,696		2,508
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		0
Allowance	$ 6,717		$ 7,911

[1] Includes net unamortized loan origination costs of $2.1 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $97 thousand and $99 thousand, respectively, at September 30, 2014 and December 31, 2013.