Credit Quality Assessment (Impaired Loans by Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	$ 35,559	$ 38,379
Contractual interest income due on impaired loans during the period	2,217	2,612
Interest income on impaired loans recognized on a cash basis	665	1,374
Interest income on impaired loans recognized on an accrual basis	281	473
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	5,662	7,153
Contractual interest income due on impaired loans during the period	319	452
Interest income on impaired loans recognized on a cash basis	232	238
Interest income on impaired loans recognized on an accrual basis	98	133
All Other [Member]
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	7,892	6,784
Contractual interest income due on impaired loans during the period	139	227
Interest income on impaired loans recognized on a cash basis	39	83
Interest income on impaired loans recognized on an accrual basis	100	233
Commercial Portfolio Segment [Member] | Commercial Acquisition, Development and Construction [Member]
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	3,948	5,451
Contractual interest income due on impaired loans during the period	512	654
Interest income on impaired loans recognized on a cash basis	68	253
Commercial Portfolio Segment [Member] | Commercial Investor Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	9,089	10,605
Contractual interest income due on impaired loans during the period	553	587
Interest income on impaired loans recognized on a cash basis	76	75
Interest income on impaired loans recognized on an accrual basis	83	30
Commercial Portfolio Segment [Member] | Commercial Owner Occupied Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average impaired loans for the period	8,968	8,386
Contractual interest income due on impaired loans during the period	694	692
Interest income on impaired loans recognized on a cash basis	250	725
Interest income on impaired loans recognized on an accrual basis		$ 77