Credit Quality Assessment (Summary of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Credit Quality Assessment [Abstract]
Impaired loans with a specific allowance	$ 15,608	$ 12,217
Impaired loans without a specific allowance	22,976	20,306
Total impaired loans	38,584	32,523
Allowance for loan and lease losses related to impaired loans	4,344	3,058
Allowance for loan and lease losses related to loans collectively evaluated	33,230	35,708
Total allowance for loan and lease losses	37,574	38,766
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