Allowance for Loan Losses (Allowance for Loan Losses by Segment & Impairment Methodology) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 32,225		$ 37,493
Loans related allowance individually evaluated for impairment	1,525		1,481
Loans collectively evaluated for impairment	2,548,899		2,425,391
Loans related allowance collectively evaluated for impairment	18,805		18,494
Total loans	2,581,124	[1]	2,462,884	[1]
Allowance	27,269		27,886
Commercial Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	24,893		30,292
Loans related allowance individually evaluated for impairment	747		552
Loans collectively evaluated for impairment	747,879		765,957
Loans related allowance collectively evaluated for impairment	6,226		6,417
Total loans	772,772		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	38,574		36,289
Loans related allowance collectively evaluated for impairment	494		362
Total loans	38,574		36,289
Commercial Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	2,585		2,556
Loans related allowance individually evaluated for impairment	324		463
Loans collectively evaluated for impairment	552,239		528,241
Loans related allowance collectively evaluated for impairment	5,130		4,970
Total loans	554,824		530,797
Residential Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	4,456		4,290
Loans related allowance individually evaluated for impairment	390		463
Loans collectively evaluated for impairment	872,183		768,384
Loans related allowance collectively evaluated for impairment	4,450		4,237
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	291		355
Loans related allowance individually evaluated for impairment	64		3
Loans collectively evaluated for impairment	338,024		326,520
Loans related allowance collectively evaluated for impairment	2,505		2,508
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		0
Allowance	$ 6,939		$ 7,911

[1] Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.