Shareholders' Equity (Regulatory Captial Requirements) (Details) $ in Thousands		Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Parent Company [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 539,496	$ 494,603
Total Capital to Risk-Weighted Assets		0.1351	0.1294
Total Capital for Capital Adequacy Purposes		$ 319,532	$ 305,728
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 503,791	$ 467,296
Tier 1 Capital to Risk-Weighted Assets		0.1261	0.1223
Tier 1 Capital Required For Capital Adequacy Purposes		$ 239,649	$ 229,296
Tier 1 Capital Required for Capital Adequacy Purposes to Risk-Weighted Assets		0.0600	0.0600
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 481,792	$ 445,298
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1206	0.1165
Common Equity Tier 1 Required for Capital Adequacy		$ 179,737	$ 171,972
Common Equity Tier 1 Required for Capital Adequacy Purposes to Risk-Weighted Assets		0.0450	0.0450
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital		$ 503,791	$ 467,296
Tier 1 Leverage Capital to Average Assets	[1]	0.0895	0.0904
Tier 1 Leverage Capital Required for Capital Adequacy Purposes		$ 225,209	$ 206,682
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	0.0400	0.0400
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 534,288	$ 490,993
Total Capital to Risk-Weighted Assets		0.1338	0.1285
Total Capital for Capital Adequacy Purposes		$ 319,503	$ 305,693
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Total Capital To Be Well Capitalized		$ 399,379	$ 382,116
Total Capital To Be Well Capitalized to Risk-Weighted Assets		0.1000	0.1000
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 498,583	$ 463,686
Tier 1 Capital to Risk-Weighted Assets		0.1248	0.1213
Tier 1 Capital Required For Capital Adequacy Purposes		$ 239,627	$ 229,270
Tier 1 Capital Required for Capital Adequacy Purposes to Risk-Weighted Assets		0.0600	0.0600
Tier 1 Capital Required To Be Well Capitalized		$ 319,503	$ 305,693
Tier 1 Capital Required To Be Well Capitalized to Risk-Weighted Assets		0.0800	0.0800
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 498,583	$ 463,686
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1248	0.1213
Common Equity Tier 1 Required for Capital Adequacy		$ 179,721	$ 171,952
Common Equity Tier 1 Required for Capital Adequacy Purposes to Risk-Weighted Assets		0.0450	0.0450
Common Equity Tier 1 Required To Be Well Capitalized		$ 259,596	$ 248,375
Common Equity Tier 1 Required To Be Well Capitalized to Risk-Weighted Assets		0.0650	0.0650
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital		$ 498,583	$ 463,686
Tier 1 Leverage Capital to Average Assets	[1]	0.0886	0.0898
Tier 1 Leverage Capital Required for Capital Adequacy Purposes		$ 225,126	$ 206,596
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	0.0400	0.0400
Tier 1 Leverage Capital Required To Be Well Capitalized		$ 281,407	$ 258,245
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	[1]	0.0500	0.0500

[1] Leverage ratio.