Shareholders' Equity (Regulatory Captial Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital	$ 319,486		$ 304,716
Total Capital to Risk-Weighted Assets	13.29%		13.26%
Total Capital for Capital Adequacy Purposes	192,306		183,876
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%		8.00%
Total Capital To Be Well Capitalized	240,382		229,845
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%		10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital	291,292		275,956
Tier 1 Capital to Risk Weighted-Assets	12.12%		12.01%
Tier 1 Capital Required For Capital Adequacy Purposes	96,153		91,938
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%		4.00%
Tier 1 Capital Required To Be Well Capitalized	144,229		137,907
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets	6.00%		6.00%
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	291,292	[1]	275,956	[1]
Tier 1 Leverage Capital to Average Assets	9.41%	[1]	9.30%	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	123,785	[1]	118,733	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	[1]	4.00%	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized	154,732	[1]	148,417	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	[1]	5.00%	[1]
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital	314,458		299,503
Total Capital to Risk-Weighted Assets	13.09%		13.05%
Total Capital for Capital Adequacy Purposes	192,147		183,651
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%		8.00%
Total Capital To Be Well Capitalized	240,184		229,564
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%		10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital	286,264		270,778
Tier 1 Capital to Risk Weighted-Assets	11.92%		11.80%
Tier 1 Capital Required For Capital Adequacy Purposes	96,074		91,826
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%		4.00%
Tier 1 Capital Required To Be Well Capitalized	144,111		137,738
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets	6.00%		6.00%
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	286,264	[1]	270,778	[1]
Tier 1 Leverage Capital to Average Assets	9.26%	[1]	9.14%	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	123,633	[1]	118,535	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	[1]	4.00%	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized	$ 154,541	[1]	$ 148,169	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	[1]	5.00%	[1]

[1] Leverage ratio