Goodwill and Other Intangible Assets (Gross Carrying Amounts and Accumulated Amortization of Intangible Assets and Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Goodwill And Intangible Assets [Line Items]
Gross carrying amount	$ 18,339	$ 18,339
Accumulated amortization	(17,717)	(17,009)
Net carrying amount	622	1,330
Goodwill gross	84,171	84,171
Goodwill	84,171	84,171
Core Deposits [Member]
Goodwill And Intangible Assets [Line Items]
Gross carrying amount	9,716	9,716
Accumulated amortization	(9,716)	(9,352)
Net carrying amount		364
Weighted average useful life		3 months 18 days
Other Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Gross carrying amount	8,623	8,623
Accumulated amortization	(8,001)	(7,657)
Net carrying amount	$ 622	$ 966
Weighted average useful life	1 year 4 months 24 days	2 years 1 month 6 days