Goodwill and Core Deposit and Trust Relationship Intangibles (Changes in Core Deposit Intangible and Trust Relationship Intangible) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 17,300	$ 17,300	$ 14,444
Finite-Lived Intangible Assets, Accumulated Amortization	13,088	12,014	11,432
Finite-Lived Intangible Assets, Net	4,212	5,286	3,012
Finite-lived Intangible Assets Acquired	0	2,856
Amortization	1,074	582
Netbook Value Of Acquired Intangible Assets	(1,074)	2,274
Trust Relationship [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	753	753	753
Finite-Lived Intangible Assets, Accumulated Amortization	452	376	301
Finite-Lived Intangible Assets, Net	301	377	452
Finite-lived Intangible Assets Acquired	0	0
Amortization	76	75
Netbook Value Of Acquired Intangible Assets	$ 76	$ 75