Goodwill and Other Intangible Assets (Changes in Core Deposit Intangible and Trust Relationship Intangible) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 17,300	$ 17,300	$ 17,300
Finite-Lived Intangible Assets, Accumulated Amortization	(14,161)	(13,088)	(12,014)
Finite-Lived Intangible Assets, Net	3,139	4,212	5,286
Finite-lived Intangible Assets Acquired	0	0
Amortization	(1,073)	(1,074)
Netbook Value Of Acquired Intangible Assets	(1,073)	(1,074)
Trust Relationship [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	753	753	753
Finite-Lived Intangible Assets, Accumulated Amortization	(527)	(452)	(376)
Finite-Lived Intangible Assets, Net	226	301	377
Finite-lived Intangible Assets Acquired	0	0
Amortization	(75)	(76)
Netbook Value Of Acquired Intangible Assets	$ (75)	$ (76)