Shareholders' Equity (Regulatory Captial Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Parent Company [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital	$ 343,934	$ 319,486
Total Capital to Risk-Weighted Assets	12.56%	13.29%
Total Capital for Capital Adequacy Purposes	219,149	192,306
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%	8.00%
Total Capital To Be Well Capitalized	273,936	240,382
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital	315,575	291,292
Tier 1 Capital to Risk Weighted-Assets	11.52%	12.12%
Tier 1 Capital Required For Capital Adequacy Purposes	109,574	96,153
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%	4.00%
Tier 1 Capital Required To Be Well Capitalized	164,361	144,229
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	315,575	291,292
Tier 1 Leverage Capital to Average Assets	9.14%	9.41%
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	138,090	123,785
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	4.00%
Tier 1 Leverage Capital Required To Be Well Capitalized	172,612	154,732
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	5.00%
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital	339,268	314,458
Total Capital to Risk-Weighted Assets	12.39%	13.09%
Total Capital for Capital Adequacy Purposes	219,075	192,147
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%	8.00%
Total Capital To Be Well Capitalized	273,844	240,184
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital	310,909	286,264
Tier 1 Capital to Risk Weighted-Assets	11.35%	11.92%
Tier 1 Capital Required For Capital Adequacy Purposes	109,537	96,074
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%	4.00%
Tier 1 Capital Required To Be Well Capitalized	164,306	144,111
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	310,909	286,264
Tier 1 Leverage Capital to Average Assets	9.01%	9.26%
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	137,964	123,633
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	4.00%
Tier 1 Leverage Capital Required To Be Well Capitalized	$ 172,454	$ 154,541
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	5.00%