Loans (Summary of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	$ 1,390,373		$ 1,363,335
Residential real estate	945,580		772,674
Consumer	338,094		326,875
Total loans	2,674,047	[1]	2,462,884	[1]
Percent of Total Loans	100.00%	[1]	100.00%	[1]
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	766,703	[2]	796,249	[2]
Total loans	766,703		796,249
Percent of Total Loans	29.00%	[2]	32.00%	[2]
Commercial Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	58,750	[3]	36,289	[3]
Total loans	58,750		36,289
Percent of Total Loans	2.00%	[3]	1.00%	[3]
Commercial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	564,920	[4]	530,797	[4]
Total loans	564,920		530,797
Percent of Total Loans	21.00%	[4]	22.00%	[4]
Commercial Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	1,390,373		1,363,335
Percent of Total Loans	52.00%		55.00%
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate	912,956		749,163
Total loans	912,956		749,163
Percent of Total Loans	34.00%		30.00%
Homeowner Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate	32,624		23,511
Total loans	32,624		23,511
Percent of Total Loans	1.00%		1.00%
Residential Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate	945,580		772,674
Percent of Total Loans	35.00%		31.00%
Home Equity Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	240,567		231,362
Total loans	240,567		231,362
Percent of Total Loans	9.00%		9.00%
Home Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	46,455		40,212
Total loans	46,455		40,212
Percent of Total Loans	2.00%		2.00%
Other Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	51,072	[5]	55,301	[5]
Total loans	51,072		55,301
Percent of Total Loans	2.00%	[5]	3.00%	[5]
Consumer Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer	$ 338,094		$ 326,875
Percent of Total Loans	13.00%		14.00%

[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.

[2] Amortizing mortgages and lines of credit, primarily secured by income producing property.

[3] Loans for construction commercial properties, loans to developers for construction of residential properties and loans for land development.

[4] Loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.

[5] Fixed-rate consumer installment loans.