Shareholders' Equity, Compliance with Regulatory Capital Requirements (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Total Capital to Risk Weighted Assets [Abstract]
Actual Amount	$ 450,890	$ 400,258
Minimum Regulatory Capital Requirements, Amount	$ 286,539	$ 259,028
Total Capital to Risk Weighted Assets, Ratio [Abstract]
Actual Ratio	0.1259	0.1236
Minimum Regulatory Capital Requirements, Ratio	0.0800	0.0800
Total Common Equity Tier 1 Capital [Abstract]
Actual Amount	$ 395,941	$ 349,601
Minimum Regulatory Capital Requirements, Amount	$ 161,178	$ 145,703
Total Common Equity Tier 1 Capital, Ratio [Abstract]
Actual Ratio	0.1105	0.1080
Minimum Regulatory Capital Requirements, Ratio	0.0450	0.0450
Tier 1 Capital to Risk Weighted Assets [Abstract]
Actual Amount	$ 405,941	$ 359,601
Minimum Regulatory Capital Requirements, Amount	$ 214,904	$ 194,271
Tier 1 Capital to Risk Weighted Assets, Ratio [Abstract]
Actual Ratio	0.1133	0.1111
Minimum Regulatory Capital Requirements, Ratio	0.0600	0.0600
Tier 1 Capital to Average Assets [Abstract]
Actual Amount	$ 405,941	$ 359,601
Minimum Regulatory Capital Requirements, Amount	$ 177,820	$ 145,255
Tier 1 Capital to Average Assets, Ratio [Abstract]
Actual Ratio	0.0913	0.0990
Minimum Regulatory Capital Requirements, Ratio	0.0400	0.0300
Bank [Member]
Total Capital to Risk Weighted Assets [Abstract]
Actual Amount	$ 446,251	$ 399,230
Minimum Regulatory Capital Requirements, Amount	286,462	259,012
Well Capitalized Under Prompt Corrective Action, Amount	$ 358,077	$ 323,765
Total Capital to Risk Weighted Assets, Ratio [Abstract]
Actual Ratio	0.1246	0.1233
Minimum Regulatory Capital Requirements, Ratio	0.0800	0.0800
Well Capitalized Under Prompt Corrective Action, Ratio	0.1000	0.1000
Total Common Equity Tier 1 Capital [Abstract]
Actual Amount	$ 401,313	$ 358,576
Minimum Regulatory Capital Requirements, Amount	161,135	145,694
Well Capitalized Under Prompt Corrective Action, Amount	$ 232,750	$ 210,447
Total Common Equity Tier 1 Capital, Ratio [Abstract]
Actual Ratio	0.1121	0.1108
Minimum Regulatory Capital Requirements, Ratio	0.0450	0.0450
Well Capitalized Under Prompt Corrective Action, Ratio	0.0650	0.0650
Tier 1 Capital to Risk Weighted Assets [Abstract]
Actual Amount	$ 401,313	$ 358,576
Minimum Regulatory Capital Requirements, Amount	214,846	194,259
Well Capitalized Under Prompt Corrective Action, Amount	$ 286,462	$ 259,012
Tier 1 Capital to Risk Weighted Assets, Ratio [Abstract]
Actual Ratio	0.1121	0.1108
Minimum Regulatory Capital Requirements, Ratio	0.0600	0.0600
Well Capitalized Under Prompt Corrective Action, Ratio	0.0800	0.0800
Tier 1 Capital to Average Assets [Abstract]
Actual Amount	$ 401,313	$ 358,576
Minimum Regulatory Capital Requirements, Amount	177,605	145,079
Well Capitalized Under Prompt Corrective Action, Amount	$ 222,006	$ 181,349
Tier 1 Capital to Average Assets, Ratio [Abstract]
Actual Ratio	0.0904	0.0989
Minimum Regulatory Capital Requirements, Ratio	0.0400	0.0300
Well Capitalized Under Prompt Corrective Action, Ratio	0.0500	0.0500